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If Arthur ever gets back to a normal life as a PI and is still bound to John he'd be fantastic at his job because he fully has the superpower to see someone's last moments. Do you know how useful that is in the PI game? Solving murders left and right. Not only that but he's twice as perceptive because John having to describe his surroundings out loud allows for him to notice smaller things he wouldn't have thought of before. Someone get these two a job fr