> I really can't believe he didn't put any escape clauses in his contract, no due dilligence, etc. I think he's very smart in general but this mistake is pretty much colossal in size.

This was not a mistake. He was seeing that his offer to buy twitter was not taken seriously. Understandably the board felt he will flake out. He wanted to show he won't flake out. The way he could demonstrate that was by binding his own hands.

So he went to his lawyers and asked them to write an offer he can't back out from. And then he got what he asked for.