Definition
Plain language
How often you have to call a bet so that bluffing against you can't be a guaranteed profit.
As stated in the literature
A game-theory-optimal poker concept specifying the fraction of the time a player must continue against a bet to render the opponent's bluffs break-even; one of the simultaneously-relevant principles underlying the decision-binding problem.
Also called: MDF
Why it matters: It gives a player a defensive floor against bluffs, ensuring that opponents can't exploit them simply by betting relentlessly.
For example, if folding too often would let an opponent profit by bluffing any two cards, this concept tells you the exact share of the time you must call to take that free money away.
Heard on the show
“Pot odds, minimum defense frequency, board texture, blockers, the whole graduate seminar.”Episode 100 — How a Prompt Wrapper Lets a Frontier Model Play Poker Like an Expert