I think I would know

Magic: "question for ya*, Dave said you tore your acl"
Pete: "no i didn't"
Magic: "yeah a couple years ago you did"
Pete: "no i didn't, it was something else"
Magic: "Dave don't know his shit, I knew it was not your acl"

*please note there is no actual question, and please also note magic tells Pete that he did in fact tear his acl, and then in the next breath says she knew it was not his acl