I don’t agree with the explanation, I think. When you first see the two frogs, one of them already is a 100% male. The fact that you don’t know that, doesn’t change this. And then you hear the croak. So from that moment you know: I see one male frog, and one frog with an unknown gender. Which is which? That doesn’t matter. One of the frogs has a 100% chance of being male, and the other 50%. So run to the frog on the stump. It’s easier to lick one frog than two.
