(adj) The quality of being foolish or ignorant concerning a cause to the point where one detracts from the strength of the cause.
Intelligent Theist: I know that neither of you believe in God, but perhaps I can convince you otherwise.
Athy Person: I'm athiest
! I know that the bible is false and that there is no God. SCIENCE proves it, so it must be true! I don't need to talk about it, my faith lies in SCIENCE.
: Yes, you are quite athy (speaking to Athy Person). I would love to discuss religion with you (speaking to Theist).
Athy Person: Thank you.