Answer:
A girl is sitting in a house at night that has no lights on at all. There is no lamp, no candle, nothing. Yet she is reading. How?
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?
The answer I give is yes, but what I mean is no. What was the question?
What can fill an entire room without taking up any space?
What was the longest river in the world before the Amazon River was discovered?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.