"Only you," he says, all affection, tracing shapes idly on her hip, "would geek out on an LSD trip."

Mulder'd like the answer to be you're psychic, Scully, anyone can see that, but even he can admit that what she's describing sounds less like a vision and more like she was high off her ass and doing the scientist equivalent of staring at her hand. "What was the Devil like?"

He, after all, is the only real connection to psychic possibilities. She'll tell him that Satan was a hallucination, too, and none of it actually meant anything, but if any of it was ESP, some message from beyond Beyond Beyond, a devil could have been. Mulder's far more willing to allow for demons within his cosmology than anyone on the other side.