Answer:
What is yours but only used by others?
No is to negative as yes is to...?
Mary gets in the shower, but surprisingly her hair is not wet when she gets out. How is this possible?
What is the only question you can't answer yes to?
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?
What sphinxes employ and players enjoy.