Answer:
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
What goes in the water red, and comes out black?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
The more of it there is, the less you see.
A man went to a place on thursday on his horse, he came back 3 days later on thursday how is this possible?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?