Gut Feelings Are Data

A "gut feeling" is not just a figure of speech. Your second brain constantly reads your insides — heart rate, breathing, tension in the gut — and sends a quick summary upstream.

Scientists call this stream of inside-the-body information interoception. It nudges your choices before you are even aware of it, which is why a decision can feel right or wrong before you can explain why.

Take financial traders. In one study, those who were better at reading their own body signals — their pulse, their gut — tended to last longer in the job.

Their bodies were feeding them data their conscious minds processed as hunches. That is interoception at work: your second brain sending signals, and your gut feeling is you noticing them.