You can. That is certainly a possible axiom as evidenced by fossil and some others, but as evidenced by git and common usage it is not necessarily "axiom 0" for

You can. That is certainly a possible axiom as evidenced by fossil and some others, but as evidenced by git and common usage it is not necessarily "axiom 0" for all possible VCS's. Unless you want to get really semantic in which case, sure "history" can't be changed, but "recorded history" certainly can.