Three questions. One type.

I don’t use personality type systems the way they’re taught. Memorizing what each letter means is just the entry point. After that, it’s faster to stop using the system directly and start using pattern recognition instead.

Now I ask everyone three questions. When I told my brother that, he said it’s mathematically impossible—you can’t determine four binary variables from three inputs.

Guess his type.

No, actually—guess.

INTP.

You could type him just from that reaction.

Start with: who would correct me?

Then narrow it: who would correct me and not want to discuss it?

A lot of types would correct me. But the ones who would correct me and not want a conversation are basically ISTJ and INTP. ISTJs usually dismiss personality typing entirely, so they wouldn’t engage. INTPs will engage—but only to point out the flaw, not to explore the system.

That’s the method.

You’re not tracking letters. You’re tracking patterns in how people think, what they notice, and how they respond.

This only works when there’s signal. The point isn’t the question—it’s what the person can’t help revealing. For something random, most types respond the same way. For example, most types would ask why is there a picture of my dog here?

I taught this in a live session last month, and people asked for another one. We’ll meet April 24 at 5pm Eastern. I’ll type people you know and walk you through the process so you can get faster.

Meanwhile, here are new personality type posts:

INTJ repairing a relationship: “I fixed it, why are you still talking?”

ENFPs talk themselves out of what they actually want

ENFJs don’t trust their impact unless they’re there

INFPs can’t reach people from outside the system

ENTJs kill their own companies by doing too much alone

INFJ writing redux