i knew that - When you feel like a total idiot because you thought you kne

When you feel like a total idiot because you thought you knew stuff, but you were wrong.

I knew that I was wrong about the test, but I still failed it. #facepalmdrama

I thought I knew how to cook, but I burnt the pizza. #notagain

I knew that I was wrong about my crush, but I still asked him out. #embarrassment