She *thinks* she knows it all.<quoted text>
She is very arrogant, and know it all.
Me: Is God real?
Me: How do you know that?
Mylan: Because I do!
Me: So you don't really know for sure.
Mylan: Yes, I know for sure.
Me: Oh how do you know?
Mylan: Because I do. Anybody that believes in an invisible sky daddy that lives in the clouds MUST be ignorant.
Me: But that still doesn't answer the question of how do you know that God is real.
Mylan: You're stupid.