It does make me wonder what safeguards if any Lemmy has against such shittification. What system might work for that? Maybe if you had a way that users could flag other users as trolls or quality contributors, and those flags carry vastly more weight if the person flagging is themselves a quality contributor. That would perhaps create a stable community, not necessarily a good one but at least one which resists change, yet allows a way in for new people.

If you were 4 and now you are 44 then you might be an integer variable. If sister is also a variable, we don’t know when she was allocated. She might also be an integer constant in which case she’s arguably immortal.

If your parents had another daughter in the meantime (or if your older brother became female), “my sister” would still be a valid reference, to a completely different person.