Thinking vs feeling (T and F) is not logic versus emotion

A friend tells you she is thinking about leaving her job. Two people are at the table and both of them want to help.

The first asks what the new salary is, how long her savings would last, and whether the thing that is wrong with the current job would also be wrong at the next one. The second asks whether she has told her manager, how she felt walking in on Monday, and what her partner thinks about the move.

Both sets of questions are reasonable. Both are aimed at the same outcome, which is that she makes a decision she does not regret. Neither person is being emotional and neither is being cold, and the difference between them is the third letter of a four-letter type.

Two ways of deciding, both of them reasoned

The description that ruins this pair is logic versus emotion. It puts one side in charge of thinking and hands the other side a mood, and once you have accepted that frame there is nothing left to understand.

Here is a better one. Both are procedures for choosing between options. They differ in what they hold constant.

The T procedure holds the rule constant. Work out the principle, apply it consistently, and accept the result even when the result is unwelcome. Consistency is the point: a decision that would come out differently depending on who was asking is not, by this standard, a decision at all.

The F procedure holds the effect on specific people constant. Work out what this does to the actual individuals involved, weigh those effects against each other, and choose the option whose damage you can live with. Fit is the point: a decision that is technically correct and lands badly on everyone it touches has not solved anything.

Both take work. Both can be done well or badly. And both produce reasons you can argue with, which is the part the logic-versus-emotion framing gets exactly backwards.

Where the two actually collide

Most of the time they agree, which is why this letter is easy to miss. The collision happens in one specific place: when a rule and a person point in different directions.

Somebody on the team has missed three deadlines. There is a policy. There is also the fact that this person's father died in March and everyone knows it.

The T instinct is that a policy applied to some people and not others is not a policy, and that the fair thing, the thing that protects everyone including the next person in trouble, is to apply it and handle the circumstances separately and openly. The F instinct is that a rule exists to produce a decent outcome, that this application of it would produce an indecent one, and that a manager who cannot see the difference between a case and a category is not doing the job.

Both of those are moral positions. That is what the framing hides. The T is not indifferent to the man whose father died; they are worried about the four people who will be treated worse next year by a system with no consistency in it. The F is not ignoring the policy; they are weighing it against a cost the policy cannot see.

This is also why the argument between them gets bitter faster than any other letter pair. Each side hears the other making a bad moral choice, rather than a different one.

The warm T and the ruthless F

Two people who break the stereotype immediately, and both are common.

The warm T is someone whose whole way of caring about a person is to take their problem seriously and try to solve it. Turning up at your flat with a spreadsheet of options is an act of affection, and it is regularly received as a failure to listen. If you have ever been comforted by someone who immediately started fixing things, you have met one.

The ruthless F is the one people do not expect. Deciding by what it does to people can produce a very hard decision, and produce it faster than the rule-based version would. Somebody who cuts off a family member, ends a friendship of fifteen years, or fires a person who was well liked is often working entirely from the effect on people, having concluded that the effect is bad enough to end the thing. The F letter does not mean soft. It means the weighing is done in a different currency.

Under real pressure both of these invert in ways that surprise everyone, which is covered in what each type does under stress.

Why the stereotype survives

Partly because it is convenient. It gives one group a compliment about being rational and the other a compliment about being caring, and nobody has to think about it again.

Partly because it is entangled with gender expectations, in a way that makes self-report on this pair less reliable than on the other three. There are figures in circulation about how men and women answer these questions, and I am not going to repeat any of them, because the numbers get quoted far more often than they get sourced. What can be said without a study is simpler: people answer questions about themselves in the way they have been taught it is acceptable to answer, and this is the pair where the teaching is heaviest.

It also survives because of what T and F are named. Feeling, in this framework, is not an emotion. It is an evaluation, a judgment about worth, and it happens to have been given a word that in everyday English means something closer to a mood. Isabel Briggs Myers chose vocabulary out of Jung, and this is the term that has cost the most confusion since.

Working out your own

The self-report question does not work well here, so use a harder one.

Think of a decision you made that was correct and that you still feel bad about. Then ask what makes it correct in your own account of it. If the answer is that it was the consistent thing to do, or that the alternative would have been unfair to someone not in the room, that is one letter. If the answer is that the alternative would have done more damage to the people involved, that is the other.

The second test is what you find hardest to say. Some people cannot say the blunt true thing to someone's face. Others can say it easily and cannot say the warm thing at all without it coming out stiff. Both of those are the same letter showing up as a limit rather than a strength.

A near-even result on this pair is common and does not mean the test failed; why a result changes between attempts goes into what a narrow margin actually is. The sixteen type pages show the letter in combination, which is where it stops being an abstraction.

What it is not

It is not a measure of empathy. It is not a measure of intelligence. It does not predict who will be kind to you, and it certainly does not predict who is right in an argument.

MBTI is a trademark of The Myers-Briggs Company, which has no connection to this site, and I am not a psychologist. What the letter is good for is the moment at the table when your friend is thinking about leaving her job, and the questions coming from the other side sound irrelevant to you. They are not irrelevant. They are the ones you were not going to ask.