Amnesiabased is a -based term in which one's system is based in amnesia or memory problems. The system in of itself is affected by amnesia/memory problems, with it being able to affect the headspace, roles, functions, headmates, etc, without being an origin.
The term coined by petrichorvoices on the Pluralpedia Discord on an unknown date. A flag was created by Tumblr user m-grouped on February 27th, 2022.[1]
The term is most likely based on the word "amnesia", and the -based suffix.