I said GOT. And while you mock me, yes or no question.
Does the wall collapse the first time it's under attack by the Zombies since it's creation ? YES/NO ?
(The Zombies outsmarting the defenders is not exactly negating this question : undead gophers would probably outsmart Jon Snow too.)
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Slowly. The wall was never attacked by the Zombies between the Long Night and present. Rather obviously, the awakening of the Zombie King is relatively recent