1 Head Death: I'm calling about...
1 Receptionist: The Large Hadron Collider. Yes, we know.
2 Head Death: You Paradox Department people always know what I'm calling about before I call! What if I hadn't called you?
3 Receptionist: Then we wouldn't have known, obviously.
4 Head Death: I hate you guys.
4 Receptionist: We know.

By the way, this sentence is not true.

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2021-02-21 Rerun commentary: The only thing the Paradox Department doesn't know is what it knows.