The Math Behind Your Gut Feeling

When you're staring down a decision that scares you, your brain is already running the numbers. It's just not very good at it.

Expected value — EV — is the idea that you can weight outcomes by their likelihood and sum them up to get a single number representing the average result over many trials. It's how poker players think about hands, how venture capitalists think about portfolios, and how insurance companies set premiums.

But it's also how you should think about asking your boss for a raise.

The Raise Example

Most people don't ask for raises they deserve because they're afraid of the worst case. But let's actually look at the math. Say there are three realistic outcomes:

• They say yes — feeling score of +75 — happens about 30% of the time
• They say "not now" but you keep their respect — feeling score of +10 — happens about 50% of the time
• Awkward tension follows — feeling score of -25 — happens about 20% of the time

Run the math: (75 × 0.30) + (10 × 0.50) + (-25 × 0.20) = 22.5 + 5 - 5 = +22.5.

A meaningfully positive expected value. The reason most people don't ask anyway is that we systematically overweight worst-case scenarios — a cognitive bias called loss aversion. Losses feel roughly twice as painful as equivalent gains feel good.

Why We Get It Wrong

The problem isn't that your gut is irrational. It's that your gut is doing its EV math with miscalibrated inputs. It overestimates the probability of bad outcomes, overestimates their severity, and underestimates the probability and magnitude of good ones.

Writing it down fixes this. Not because you'll suddenly have perfect probability estimates — you won't. But because you'll notice when "the worst case is so bad I can't risk it" is really just your imagination running wild. The worst case of asking for a raise is an awkward conversation. Not a firing. Not a ruined career.

The Scale Is Everything

The feeling scale (-100 to +100) matters enormously. Be brutally honest. Most "bad" outcomes in everyday life aren't actually that bad. An awkward meeting is a -25, not a -90. Getting passed over for a promotion stings, but it's probably a -35, not a -80.

When people first use this tool, they tend to rate bad outcomes too harshly and good ones too conservatively. Try to rate them the way you'd feel a week after they happen, not in the immediate moment of imagining them.

The goal isn't to get the math perfect. It's to make your assumptions visible so you can examine them honestly.

Once you can see the numbers on paper, you can ask: "Is this probability realistic? Is this feeling score honest?" And often, the answer reveals that the decision is much clearer than it felt.