As a newbie to this site, perhaps I don't understand. This was under the category of "sophisms", which means a faulty or flawed argument. It's like a bad syllogism:
The **** crows.
The sun rises.
Therefore, the sun rises due to the ****'s crow.
Compare with:
If you answer correctly, I will return the child.
If you answer incorrectly, I will eat the child.
Therefore, I will (or will not) (return/eat) the child.
There's not really a riddle here, so there can be no answer. But it does make for some interesting discussion, doesn't it?