There's an Alan Moore short story early in his career that he declined to have reprinted because he realized after he'd written it that he'd inadvertently ripped off Lafferty. The story concerns a man who builds a machine that lets him go slightly back in time, which he uses to his advantage at a casino, but who is then thwarted by a coat attendant with a "probability manipulator." I'd love to track down the original Lafferty story. Does it ring a bell?
Answered below, but wanted to make sure all the content was posted. Do you recall which Moore story that was? Would be interested in seeing that influence, however unintended.
Got the answer, fantastic and thank you so much. The story is one of his shorts for 2000 A.D. called “The Return of the Two-Storey Brain.” It’s Reprinted in the anthology The Complete Alan Moore’s Future Shocks, and was originally from 2000 A.D. #209.
Thanks! Really interested what for Moore constitutes inadvertent vs. entirely advertent borrowing from sources…