5 seconds is a lot. They will foul immediately, then call a timeout and have plenty of time to get off a shot. Without the remaining timeout, that changes a lot.I think you always should foul. Even if the guy you are fouling is a 100% free throw shooter.
If they make both free throws then you are still up 1 point with the ball and like 5 seconds left.
I prefer to be up by 1 rather than tied up which is what you risk by not fouling.
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