<:> Simplified riddling
In the simplest riddles the answer is a compound word which combines two
other words, such that one of the words is a pseudonym for the object
specified in the question, and the other satisfies the description,
e.g.,
- Question: what do you call a flat surface that wags?
- Answer: a tailplane.
Here `tail' satisfies the description `wags' and `plane' is a type of
flat surface.