He's not entitled to such proof. It isn't a condition of the purchase agreement. His choices are: pay the original price, or pay the $1 billion cancellation fe

He's not entitled to such proof. It isn't a condition of the purchase agreement. His choices are: pay the original price, or pay the $1 billion cancellation fee. There might be a third choice: Twitter could offer to renegotiate, but they aren't obliged to. They could take the $1 billion instead.