It's not just memory, the physical body also encodes trauma and stress (The Body Keeps the Score is a book that touches on this).
I would argue that if a human has absolutely zero change, mental or physical, no atom of their being is modified, then no they did not experience suffering.
> I would argue that if a human has absolutely zero change, mental or physical, no atom of their being is modified, then no they did not experience suffering.
That's an interesting point... but I'd argue it falls into the same category as qualia. It's basically this: if the state returns to a previous configuration, the qualia in that time did not exist.
Being about qualia means it is probably unanswerable.
> I would argue that if a human has absolutely zero change, mental or physical, no atom of their being is modified, then no they did not experience suffering.
Just because you don't remember the suffering doesn't mean you didn't experience it in the moment. Suffering does not suddenly become okay if your mind and body are going to forget it. "It's okay to torture someone if their mind and body both won't remember it afterwards" sure is a take.