Penny: Okay, look, I Googled it. I took the picture, so it's my discovery. (scoffs) He stole my comet.
Leonard: I know, but on the other hand, do you really care?
Penny: Yes, I care. This happens to me all the time. People take one look at me and assume I don't know what I'm talking about.
Leonard: Oh, I'm sure that's not true.
Penny: I'm sorry. Are you saying I don't know what I'm talking about?
Leonard: No, I'm not saying anything, ever again.