The logic used when making a statement and freezing or drawing a blank when asked for proof or evidence esp. when related to a form of praise or insult.
Person A: "I appreciate how you're always so real with me"
Person B: "Oh yeah? Thanks! Like when?"
Person A: "Uh.... I don't know"
Person B: "Wow...that's some real Cassie Logic"
Person A: "You stay lying!"
Person B: "Really? When have I lied?"
Person A: "I can't tell you right now."
Person B: "So you have no proof?"
Person A: "No, but you be lying!!!"
Person B: "Wow.... I'm not respecting your Cassie Logic."