Those who cannot remember the past are condemned to repeat it.

I hate this saying. It's not explicit, and logical consequence isn't bidirectional, but it implies that those who do remember the past somehow won't repeat it. Which is blatantly false. Many people, even those who intimately know history, want to repeat it. Either because they think material conditions are just different enough to lead to a different result this time, or that the precise way the actions in the past was carried out was subpar and with tiny tweaks it would lead to a different result, etc. I do generally agree with the explicit statement, but I strongly disagree with the implicit statement.