INTP Personality Type: It’s Basically Solved

Contents
  1. INTP Traits: It's Basically Solved
  2. INTP Careers: The Bench in the Basement of Building C
  3. INTP vs ISTP: Four Days and Six Weeks
  4. INTP Strengths and Weaknesses: The Kitchen Table, October 2013
  5. INTP Relationships and Compatibility: Consulted, Never Called
  6. INTP Under Stress: The Week He Wouldn't Come to the Door
  7. INTP Behavior: Docket 14-0817
  8. What Is the INTP Personality Type: The Machine That Reads Its Own Instructions
  9. INTP Cognitive Functions: Where It Stops
  10. INTP Personal Growth: The List on the Door
INTP personality type — the Logician

On Tulip Street there is a basement of things that are eighty percent finished, and upstairs there is my brother, who finished the one thing that mattered and never mentioned it. I found out from a docket number.


He had the pump apart on the bench with the board out and a light on a gooseneck bent down over it, and he was talking to it, not to me.

“See, they moved the sense line in the ’18 firmware and nobody in the world told anybody,” he said. “So this alarms on the third occlusion and not the first. Which is fine. Unless you’re running two in series, which everybody does at three in the morning.”

“Tad.”

“So there’s your ghost alarm. Whole floor’s been writing them up as user error for two years.”

“Are you telling somebody?”

“It’s basically solved,” he said, and he put the board back in.

He has been saying that sentence to me since 1984. I have heard it about a differential, about a heat pump, about my daughter’s ear infection, about the Eagles’ offensive line, and about a hospital pump on a Tuesday in June, and I want to be fair, because this whole thing has to be fair or there is no point writing it: he has been right every single time.

My sentence about my brother, in service since roughly age eleven, delivered at that table, to my wife, to Dez Kaczmarek, and to anybody in Port Richmond who would hold still, is this: he knows everything and he has finished nothing.

You want to argue. Fine. Three years at Drexel and no degree. Twenty-eight years on a bench two pay grades under what the man can do, and he trains the people who get promoted over him and he does not notice that he is doing it. There is no company. There is no patent. There is no paper with his name on it. There is a basement on Tulip Street with eleven things in it that are eighty percent done and have been eighty percent done since our mother was alive, and one of them is a spectrum analyzer he built from parts that works, that I have used, that he never put a case on.

And here is my end of it, which I am going to put on the table now instead of at the bottom where it would go if I were trying to come out of this well.

In March of 2019 a converted mill on Salmon Street burned. Eleven units. Nobody died. Two guys from Ladder 19 went to Temple, one of them for a shoulder, one for smoke, and one of them was a kid I know. The origin was a branch circuit connection in a wall on the second floor, and the method that connection was made by is a method I inspected and passed on that building in 2016 and on about forty others between 2009 and 2018. I sat for a deposition in 2021. I still have my license. It carries a consent agreement and a fine and it will carry them until I die.

In October of 2013 my brother sat at our mother’s kitchen table and told me that method was going to fail, and told me why, and told me approximately when.

Thanksgiving of 2016, my niece’s boyfriend — a kid who lasted eight months — said four letters across the table about Tad, and said them like a diagnosis, and everybody laughed and Tad laughed the hardest. Eight years went by before I typed them into anything. I would like to call that pride and it was not. It was that I already had a whole sentence about my brother, and a man does not go looking for a second opinion on a sentence that has been working for him since he was eleven.

INTP Traits: It’s Basically Solved

The phrase, in order, as best I can date it.

1984, our father’s Fairmont, a noise in the front end: it’s basically solved. He was sixteen and he was right, and the car sat in that driveway with the noise for another year and a half.

1997, a heat pump at my mother-in-law’s: it’s basically solved. Correct. He never touched it. I paid a guy four hundred dollars to do the thing Tad had already described to me over the phone, in order, including which fitting.

2004, my daughter’s ear, three doctors and eleven weeks in: it’s basically solved. He was correct about that too, and he told it to Colleen at a christening, once, at normal conversational volume, and it took a fourth doctor and another five weeks for the world to catch up to a thing my brother had said out loud in a church basement holding a paper plate.

2011, Bridesburg, which gets its own section.

2013, the kitchen table.

Three weeks ago, a pump on a bench.

Now, I have thought about this for a long time and I want to be precise, because precision is the only currency that man accepts. He is not bluffing. He is not one of these guys who says he could have done it. When Tad says a thing is solved, the thing is solved — inside his head, correctly, checkable, and usually years before anybody else gets there. What does not happen is the next part, because there is no next part. The next part, for him, is not a part of the problem.

I called that laziness for thirty years and I would like to say I have stopped and I have not entirely stopped.

The basement on Tulip Street. Our father was a machinist at Cramp’s and then at a shop off Aramingo and he had a bench down there with a rule about it, which was that you could use anything on the bench but the third drawer was his and you did not open the third drawer. Tad opened the third drawer in about 1979. What was in it was our father’s micrometer set and a photograph of a woman none of us has ever identified. He closed it and never mentioned it to a living soul until our mother’s funeral in 2022, when he told me in the parking lot in about nine words and then went to get the car. Four years he and I were down in that basement, from when I was seven to when I was eleven, and he took apart everything in the house that could be taken apart, and he put back about half of it, and my mother beat us both for the radio.

INTP Careers: The Bench in the Basement of Building C

He has been at that hospital twenty-eight years. Biomed. Building C, basement, no window. Infusion pumps, monitors, warmers, anything with a board in it, and when something comes down there that four people have already looked at, it goes on his bench.

What comes down to that basement in a week: forty-some pumps off a rotation, a warmer that somebody dropped, three monitors that alarm for no reason anybody upstairs can describe, and one thing a manufacturer’s rep has already looked at and declared fine. The rep’s item is the one that ends up on my brother’s bench, and about a third of the time my brother is right and the rep is wrong, and there is a folder of emails from Ohio proving it that nobody has ever read.

He is a Grade 3. There is a Grade 4, there is a supervisor, and there is a director, and he has been offered the first two and turned them both down.

I asked him about it the second time, in 2019, in his kitchen.

“It’s four more meetings a week,” he said.

“It’s eleven thousand dollars.”

“Yeah.” He was doing something with a soldering iron. “But it’s four more meetings a week.”

Seven years I have been furious about that conversation, and seven years I have failed to locate the flaw in it.

Here is what an outfit gets from one of these, and I say this as somebody who runs a desk at a licensing department. You get the best diagnostic mind in the building at a Grade 3 rate. You get a man who will find, for free, on his own time, a firmware behavior the manufacturer does not know about. What you do not get, ever, is the memo. He will not write it up, he will not put it in front of the committee, he will not stand in a room and say I found this, it matters, here is what we do. He will tell one person who asks him a good question and then consider the transmission complete.

What an employer decides that is worth, and what thirty years of the decision leaves on a pension statement, is a question for whoever sets the grades, and I have never set a grade in my life. And two different people can carry an identical mind into the same room and have that room hand back two different verdicts.

INTP vs ISTP: Four Days and Six Weeks

Summer of 2011 there was a warehouse in Bridesburg that kept tripping a main and four people could not find it, and I put my brother together with Dez Kaczmarek, and for four days it was the best thing I have ever watched.

Dez is sixty-one and he is the best troubleshooter in the northeast of this city and I will fight anybody about that. He also keeps pigeons on a roof off Richmond Street, forty-some birds, races them out of Ohio and West Virginia, and can tell you which bird is off by the way it comes down onto the trap. He has never once, in the thirty years I have known him, explained to me why he does it, and I stopped asking around 2004.

The two of them at that panel: Tad standing back about six feet with his arms crossed and a printout, Dez up in it with a meter, and the pair of them going back and forth for forty minutes at a time in a shorthand I could follow about one word in three, and neither one of them once saying I think. Everything either of them said was either a measurement or a consequence of a measurement. I have been in a lot of rooms in this trade and I have never seen two men agree that thoroughly about what counted as an argument.

What those two did for four days was talk to each other in a language I could follow about one word in three. Same instrument, is what I thought at the time. Each of them builds the whole apparatus in his head first, and neither one will accept an answer off you secondhand no matter who you are.

Day four, about eleven in the morning, Dez found it. A neutral bonded where it had no business being bonded, sixty feet up in a raceway nobody had opened since 1974. He fixed it, he ran it, he verified it, and he was in his truck by two in the afternoon eating a hoagie.

Tad stayed six more weeks.

Nobody paid him for that. Nobody asked him for it. The trips had stopped. But the minute Dez fixed the instance, the general case cracked open for my brother, and he went at it — the trip curves, the harmonics off the VFDs on that floor, why this class of thing hides for forty years — and six weeks later he had a written account of a failure mode that nobody in that building wanted, needed, or read.

Dez said to me that August, “Your brother don’t know when it’s over.”

I have quoted that line for fifteen years. I have gotten laughs with it at three separate Christmases.

Here is where they part, and it took me fifteen years to see it. Each man carries his own working model and will not close on any conclusion he did not build himself. What closes it is not the same thing. For Dez, the object closes it: the main holds, the matter is finished, there is another call at one o’clock. For Tad, objects do not close anything. What closes it is understanding, and understanding does not close — every time he gets one, it opens three more doors, and every one of those doors is more interesting than a hoagie.

Now hand each of them the other one’s assignment. Dez gets the six weeks and there are no six weeks, because there is no instance sitting in front of him, so there is no work, so he goes home. Tad gets the four days and that warehouse is still down on Friday, because he never touched a wire the entire time — he was at the panel reading curves — and a warehouse does not need a theory of the class, it needs the lights on.

INTP Strengths and Weaknesses: The Kitchen Table, October 2013

The strength I have already given you and I will give it again because it is the wall this entire thing stands on: he is right, early, about things nobody has asked him about, in fields he was never trained in, and he does it for free.

The weakness is cut out of that same wall, and I am the wrong man to be delicate about it, so.

There is a conversion step in this world. A thing you know becomes a thing you wrote down, becomes a thing with a number on it, becomes a rule, becomes money, becomes standing. Every institution I have ever worked for or against runs entirely on that step and on nothing else. I have built a whole career inside it. I could not diagnose my way out of a hallway, and I know exactly which form gets a thing done, and one of those two skills pays.

My brother does not have the equipment for the conversion and it is not modesty and it is not fear. The step is invisible to him the way the color red is invisible to a dog. He does not perceive that a solved thing and a filed thing are two different objects, and if you sit him down and explain that they are, he will agree with you, sincerely, and it will change nothing, because agreeing is also a thing that happens inside his head.

October 2013. Our mother’s kitchen. She was at the sink, there was a Tastykake box on the table, and my brother laid it out for me in about four minutes.

The connectors. The way that alloy moves against copper every time a circuit heats and cools. Why it holds fine at inspection and holds fine at two years and starts letting go somewhere between five and eight on whatever circuit in the building runs hottest. He said five to eight and he said it flat, the way he says everything, and he drew the temperature cycle on the back of the box with his finger, not even a pen.

He also said, and I want this in the record because it is the part that gets me, that he had run it past two people at the hospital and that neither of them did that kind of work, and did I know anybody at the state.

I did. I knew four people at the state. I had one of them on speed dial.

And I said, and I have had thirteen years with this sentence, so I will hand it to you exactly the way I handed it to him, in front of our mother:

“Tad. When you’ve finished one thing in your life, one, then you can come tell me how to do my job.”

He said, “Okay.” Not sarcastic. He said okay, and he ate a Butterscotch Krimpet, and he asked my mother about her hip.

My mother said, from the sink, without turning around, “Stashu.”

That is the entire objection anybody raised in that room, and I did not answer it, and she died nine years later and never brought it up again.

I have to add the part that makes it worse, because this is the part I actually think about at four in the morning. It felt good. It felt like landing a punch I had been setting up since 1983. I drove home that night pleased with myself.

I passed that method on approximately forty more jobs between that Tuesday and 2018. Salmon Street was 2016. That is three years after the table.

INTP Relationships and Compatibility: Consulted, Never Called

Everybody in this family calls my brother and nobody in this family invites him anywhere.

Nobody means it as a slight. It describes a working arrangement that took thirty years to set and that everybody, him included, is fine with. You call Tad when something is broken or when you cannot understand something. You do not call Tad about your divorce. He will listen and he will understand it — he will understand it better than the person having it — and then there is nothing, because for him the understanding was the response. He got there. He is done. What is he supposed to do now, say it back to you slower?

My wife put it better than I ever have. She said, “Your brother is the only person I’ve ever met who can know exactly what you need and not experience that as a request.”

He came to our house every Christmas for twenty-six years and never once brought anything, and fixed something every single time without being asked and without mentioning it afterward. Colleen keeps a list, which she started as a joke. The dryer in 2009. The garage opener, twice. My daughter’s laptop in 2014 at eleven at night, and Erin never knew he did it, and he never told her.

I will give you the one that stays with me. In 2021, the week I got the deposition notice, I drove over to Tulip Street and sat in that kitchen for two hours. I did not ask him for anything. What I wanted was for him to say it was going to be all right, or to say it was not my fault, either one, I was not particular.

What he did was ask me eleven questions about the scope of the inspection, and the questions were so good that two hours later I understood my own exposure better than my lawyer did. Then he made coffee.

He knew what I came for. I am certain of that now and I was fairly sure of it then. Getting there — knowing precisely what his brother had driven over to hear — was the whole of the operation for him. What he did next was not a decision to withhold it. There is no next.

Married to it, across a table nightly instead of four years downstream at Christmas, is a set of rooms nobody has let me into, and the account belongs to whoever lived there. And what a family does with the not-answering depends a good deal on whether the one doing it is a man or a woman, which I have watched play out here and am not the one to write up.

INTP Under Stress: The Week He Wouldn’t Come to the Door

Our mother died in June of 2022 and the week after, my brother did not answer his phone or his door for six days.

I want to be careful describing this because everybody who has read one article about this type thinks they know what it looks like, and they think it looks like a man getting very quiet and thinking hard, and that is not what it was.

I got in there Saturday with my key. The house was fine. He was fine, physically. What was happening was that he had cleaned and re-sorted our mother’s entire kitchen, every drawer, every cabinet, alphabetized where alphabetizing was possible, and had written out on legal paper a fourteen-page inventory with condition notes. Fourteen pages. On the amount of Tupperware in that house.

And when I came in he started in on me, and out of him came every unfair thing anybody had ever done to our mother going back to 1974, with dates. Aunt Bernie in 1981. A priest in 1994. Me, twice. All of it accurate, all of it filed and dated and perfect, and delivered with a heat I have heard out of that man maybe three times in fifty years, and then he could not stop and he got up and started on the pantry.

The way I understand it now: when the world hurts that man he reaches for the one part of himself he was issued the least of, which is the part that puts the outside in order and settles accounts with people, and he runs it flat out until something gives.

And the reason it comes out so ugly is that the part was never weakened by disuse. It is simply small. There is nothing wrong with the accounting. Every item in it is correct and dated. What there is no equipment for is the question of whether an accurate account of Aunt Bernie in 1981 is a thing a person says out loud to his brother in a kitchen four days after burying their mother. That is not thinking. That is the opposite of thinking: a man with an enormous engine and a very small pump, bailing with the pump.

And I will say this plain, because I stood in that kitchen and made a joke about the Tupperware. A bad week does that. If it will not let up — if a person is still not sleeping and still counting grievances from 1981 three months on — then it has quit being a personality, and no brother is any use against it and no page is either. That is doctor work. That is a licensed therapist. I have yet to regret being the guy who said it too early.

Colleen asked me that Saturday night what I had said to him. I told her I had made a joke about the Tupperware, and she looked at me for about four seconds and went upstairs.

Sixth day he came to the door. Ninth day he was back at the bench. He did not apologize and he did not refer to it, and when I brought up Aunt Bernie in 1981 about a month later, carefully, he said he did not remember saying anything about Aunt Bernie, and I have never established whether that was true.

Nobody in this family has ever mentioned the fourteen pages. Including me. Until right now.

INTP Behavior: Docket 14-0817

After the consent agreement I stopped sleeping properly and I got into a habit, which is that I am up between one and three most nights on my phone reading about things I already know.

February of 2024, 1:40 in the morning, I finally typed in the four letters that kid said at Thanksgiving in 2016.

I read about them for about an hour. I want to report honestly that my first reaction was contempt, and my second reaction, around three in the morning, was that I had just read a description of my brother written by somebody who had never met him, and that the part about not finishing was in there, and that everybody who writes this stuff treats it as charming.

The habit stayed. That is the only reason any of the rest of this happened.

The eleventh of July this year, ten past two in the morning, I was going through old code-adoption comments — the public docket, the state, the 2015 cycle, the material I should have read in 2015 — because I was looking for whether anybody had raised the connector question before the fire.

Somebody had. In July of 2014.

Docket 14-0817. Comment period, 2015 cycle. Four pages. Submitted by T. Ruszkowski, and an address on Tulip Street.

I sat on the edge of the bed and read my brother’s document at two in the morning with my phone brightness all the way down so I would not wake my wife.

It is right. Every line of it is right. It is the same thing he told me at that table nine months earlier, and it is better than what he told me at that table, and there are two graphs in it he made himself.

It is also, and I say this as a man who has read four thousand of these, one of the worst pieces of advocacy ever submitted to a public body. There is no cover letter. There is no summary. There is no ask — nowhere in four pages does it say what it wants anybody to do. It is filed under the wrong article. It opens with a paragraph about thermal cycling in a tone that assumes the reader already cares, and it ends without a conclusion, in the middle, the way a man stops talking when he has finished thinking.

Disposition: Outside scope of this cycle. No action. November 2014.

Procedurally, that ruling was correct. I would have written it myself.

Ten days later I sat in a committee meeting in a room on Arch Street where I have a seat, on the connector question, which is live again now for obvious reasons. And when it came around to me I read out two paragraphs of my brother’s 2014 filing.

I did not say whose they were. Nobody asked. A woman from the fire marshal’s office wrote down what I said and asked me to send it to her, and I said I would, and I have not yet.

What Is the INTP Personality Type: The Machine That Reads Its Own Instructions

  1. I was nine and he was thirteen and we were in the basement and he had a shoebox and a stack of index cards, and he was explaining to me — because I had asked him something stupid, which was how you would know if a program was broken — that you cannot build a machine that looks at another machine’s instructions and tells you whether that machine is ever going to stop. The national figure runs about one in thirty, most of them men — fewer than two women in a hundred.

He did it with the cards for about twenty minutes. I remember the cards. I do not remember him telling me it had a name, and it does have a name, and I looked it up last month, forty-five years later, at two in the morning, like everything else in this account.

I have used that explanation as a stick since I was about fourteen. You can’t tell if it’s ever going to stop. I have said it to his face. I have said it about him at a wake.

The letters, the way I write a report, one line each.

I — the work happens in there, alone, and comes out finished or does not come out.

N — every solved thing opens three unsolved ones, the three are more interesting than the one, and that is the engine and the fault together.

T — the test is whether it holds together. Whether anybody wants it does not enter in, and neither does what it does to the room. He would apply that test to his own funeral.

P — nothing closes. A deadline is a fact about an institution, and he does not dispute it, he just does not experience it as being about him.

Below the letters there is a schedule of four working parts, ranked. On this one the private model-building takes nearly the whole rating, the branching is what feeds it, and the conversion machinery, meaning the memo and the ask and the room, comes in dead last with almost nothing allocated to it. That is a man who can hand you 2019 in 2013 and cannot hand it to a docket in a form anybody will act on.

Which is when it finally landed, what he was actually explaining to me in that basement in 1981. The result says nothing whatsoever about the machine. It says something about the observer. It is a proof that you cannot stand outside a process with a clipboard and determine whether it is going to finish. I have been standing outside my brother with a clipboard since 1983.

Numbers, and then the caveat, which I will give you the way I give it at a hearing. About three in a hundred, and better than seven in ten of those are men. And every other percentage you are going to see quoted was built out of people who went and took the questionnaire on their own, or whose employer paid for a workshop, which is a self-selected population, and I have had testimony thrown out for less.

The basis question, one paragraph. There are four things being measured underneath, and they are measured well enough that the same person reads the same a year later, which is a real result and I decline to talk it down. What has no basis is the last move, where four readings become sixteen named kinds of people. Somebody picked those sixteen. No calculation produces them and none ever did. Use it the way I use a manufacturer’s data sheet: informative, not controlling.

And a description like this one is a general provision. You are a field condition. Wherever it quits matching you is where the general provision quits governing, and that is the only part of this page with your address on it.

There is a list on the back of the door of his shop in Building C: every question anybody has ever asked him that he could not answer. Four hundred and some, no dates, no answers, nothing written beside any of them. I asked what it was for and he said it isn’t for anything. Entry sixty-one is in our mother’s handwriting and she never once set foot in that building.

INTP Cognitive Functions: Where It Stops

The first part is the model and it is built alone and it is the whole of him. Officially the stack is introverted thinking, extraverted intuition, introverted sensing, extraverted feeling, in that order — the basement agrees with the first two.

He takes a thing apart until he has an account of how it works that satisfies him, and satisfies him is a standard with no appeal and no committee, and when he gets there, the process terminates. That is the piece I had wrong for forty years. I thought stopping was a failure of will. Stopping is the correct output. The machine ran and it halted and it produced the answer, and the answer is in his head, and there is no step in the specification that says now go tell the state.

The second part is what makes him unstoppable and unemployable at the same time, and it is the branching. Bridesburg is the whole demonstration. Dez closed the instance and the instance opening the class is not something my brother chooses; it is what happens. Six weeks, unpaid, producing a document.

He has a third part that runs on the file, and it is why the trip curves from 2011 are still in there, and why he could give you 1981 and 1994 and the exact dates standing in our mother’s kitchen. He is not sentimental. He is indexed. The distinction matters and this family has never once made it: he did not keep those grievances because they hurt. He kept them because he keeps everything, and when the pump was running flat out that week it pulled up whatever the index had, and what the index had was thirty years of other people being wrong.

And the fourth has an empty drawer, and the fourth is the room. The ask. The version of yourself a man has to perform in front of a committee to make a true thing operative. Twenty-eight years at Grade 3 and a four-page filing with no cover letter are the same fact stated twice.

He told me in the car in 2023 that he left Drexel in 1989 because he had stopped learning anything there, and that it had nothing to do with Dad.

I have never believed that. I do not believe it now.

INTP Personal Growth: The List on the Door

The published material on growth for this one is a page of advice about following through and setting deadlines. I would invite whoever wrote it down to Building C to set my brother a deadline.

The growth I can actually document is one item and it belongs to him.

In July of 2014, nine months after I told him to finish one thing in his life, my brother wrote four pages and sent them to a state docket. He had never done that before and he has not done it since. It is a bad filing. It is also the only time in fifty-eight years that man tried to move something from his head into the world through an official channel, and the reason he tried is sitting at a kitchen table in October of 2013 with a Tastykake box in front of him being pleased with himself.

So it is in him. It has always been in him. What it took was somebody he cares about saying the cruelest available thing to his face in front of his mother. I got one out of him, and the price was eleven units on Salmon Street and a kid from Ladder 19’s shoulder, and I will not pretend that trade came out anywhere but where it came out.

I have set something up. There is a seat on a technical subcommittee, I know the woman who fills it, and I have had two conversations. Four separate times I have told myself it is not for me.

I still have not sent the fire marshal’s office that email.

Saturday I was down at Building C. He had a monitor open and the light bent down over it and he was talking to it, and I stood there a while, and then I went over to the back of the door and took the pen off the string and wrote on his list, underneath four hundred and whatever.

I wrote: Did you know I was going to pass it anyway.

He did not turn around. He said the sense line on this one was in the right place, so it was something else.


The people in these essays are composites drawn from long observation. The theory is not.

This article is available at https://cinemawords.com/en/intp-personality-type/

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