This term was coined and originally posted by @anyolovez, who has since deactivated. The post is copied out here word-for-word for archival purposes.
Repevisum
From the Latin word repenso, meaning "reimburse." Apart of the -visum collection; can be combined with other terms.
Repevisum refers to a headspace in which it's existence is passive; nothing happens and it does not exist until it is focused on/entered. Once headspace is acknowledged, pseudomemories are immediately created to fill in the gaps.
These events did not actually physically take place, but were rather implanted into the system.
Memories may be hazy mixtures of feelings/concepts/visual snippets rather than well defined recallings. Sometimes memories may not even be implanted. Some memories may be immediate, some memories may take a bit of time to fully form.
The memories are then treated as if they really happened since that is what everyone feels. Headmates memories will always align with each others; one headmate remembers talking to another headmate, that other headmate will remeber the same thing.