paradox

US /ˈper.ə.dɑːks/
UK /ˈper.ə.dɑːks/
"paradox" picture
1.

a seemingly absurd or self-contradictory statement or proposition that when investigated or explained may prove to be well founded or true

:
The statement "This statement is false" is a classic paradox.
It's a strange paradox that the more you give, the more you have.
2.

a situation, person, or thing that combines contradictory features or qualities

:
The film is a paradox of humor and tragedy.
He is a paradox, both brilliant and incredibly naive.