Expected-value reasoning

Definition

Expected-value reasoning chooses an action by listing the possible outcomes, assigning each a probability, and multiplying that probability by the outcome's magnitude — then comparing the weighted totals across options. The center of gravity is always a decision under uncertainty: not 'what will happen?' but 'given the odds and the stakes, what should I do?'

Memory hook

“Don't just count the odds — multiply them by what's at stake, then choose.”

What it sounds like

• Even if it only works half the time, the payoff makes it worth the attempt.
• The downside is small and capped; the upside, weighted by its odds, is larger.
• I'd expect to lose a little most days, but win big enough on the good ones to come out ahead.
• At those odds and that prize, entering costs less than it's worth in expectation.