Had a dream working in an anomalous library tracking changes to consensus reality. I was working on a very bureaucratic procedures update when hypermatter was retrospectively erased from reality, requiring matter and antimatter to now be perfectly balanced from then on.
I said to my dream-coworker “oh god, I won’t even remember hypermatter.”
In memory of hypermatter, which never existed 🥂
(Also this justified why the procedures were so bureaucratic in the plot - the only reason I, an inexperienced Librarian, knew about the erasure of hypermatter was because the filing procedures called for the use of it, and I was somehow unable to comply with them)