medium · Poker Theory Postflop

Hero raises a flop c-bet with a flush draw. Why is the 'called branch' of this semi-bluff often described as 'free' or having 'zero cost'?

1. Because the hand's equity against the continuing range roughly equals the cost of the call.
2. Because the pot odds on the flop always justify a call with a nine-out flush draw.
3. Because Villain cannot re-raise once Hero has committed to the semi-bluff.
4. Because Hero will always win the pot if they hit their flush on the turn.

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