It is no engagement at all. Only a legally binding contract and proof of sufficient funds is valid. If the Saudi's would take care of the secured funding it would have been written down. But it was clearly not. Following your logic Buffett wants to take Apple of the market as he bought for billions stocks.
“Secured funding” has a meaning. He said it publicly. He doesn’t have secured funding. He claimed that he would burn the shorts. He lied to burn the shorts. Everyone will have a field day except the lawyer defending him.