Read before you decide.

Seventy years of research on evidence and decisions, in six findings that still embarrass every company calling itself data-driven.

Every company will say yes. The only measurement that means anything is where AI enters a decision — and whether anyone checks it when it disagrees with the boss.

A founder's note on what the Institute for Human Reasoning is for, what it refuses to be, and what the word "institute" obliges us to do.

A historian of science figured out who reaches for numbers and why. His answer is a map of power in your meetings.

The most common fate of a study is not being wrong. It is being filed. Here is the only metric of research value I trust, and the three questions that keep a study alive.

It is not a rule. It is a shortcut I use to work out how many people to talk to — and it only works if you do the part nobody quotes.

Neither camp is right. Simulated respondents are excellent at one job and dangerous at another, and the line between the two is where most teams get lost.