Ha! I have had similar "momentary lapses of reason".
I had a panic attack two days ago where I could not find a really rare issue of I Palantir in my fanzine collection, so I had to go through and re-verify my catalog all of them in entirety. Found it! (It is just slightly larger than the other issues, so it got filed somewhere else). Also found one issue of another fanzine that I had forgotten to add to the database, and then happened to find an issue of one fanzine I never knew about! It was tucked inside a different fanzine and somehow stayed there for years and years undetected.
I had a panic attack two days ago where I could not find a really rare issue of I Palantir in my fanzine collection, so I had to go through and re-verify my catalog all of them in entirety. Found it! (It is just slightly larger than the other issues, so it got filed somewhere else). Also found one issue of another fanzine that I had forgotten to add to the database, and then happened to find an issue of one fanzine I never knew about! It was tucked inside a different fanzine and somehow stayed there for years and years undetected.