Answer: No, Fred's not promise binding.
This is a case of Promissory estoppel, where;
Promissory estoppel is the legal principle or terminology which states that a promise is enforceable by law, even if made without formal consideration, when a promissory has made a promise to a promisee who then relies on that promise to his subsequent detriment.
In certain cases where the Promisssee relied on the promise of the promissor and suffers substantial damage then some recovery can be done by treating the case as Promissory estoppel.