thedungeondelver
Adventurer
There are probably a few other checks around in the game, but I think I've made my point: 2e (and 1e) was a mess, because you never knew how any particular thing was resolved in the rules.
Yes, once you were exposed to the rules and learned them, you immediately forgot them and couldn't learn them again. Wait, I rolled high last time on my to-hit? Do I have to roll high on my to-hit again?! What kind of bizzarro mess of a rule system is this!