Have you ever read something that you know you must have written, but have no memory of it?
Getting back into one of my novels, I found exactly this and even after I had finished reading the scene in question, looked at the date on the file and looked at other scenes written around that date… nada.
I simply have no memory of it.
I have no memory of even thinking that adding that plot point to the novel was a good idea. (That part I do normally remember eventually.) So it remains a mystery.
I’ve had an eventful year or so since it was written, so I assume it’s been misfiled somewhere in the ‘stacks’ of my memory. And the memory-librarian is looking puzzled and at little shamefaced.