On November 1st John offers in writing sent by fax to buy Bob's boat for $5,000 provided Bob accepts the offer by fax, no later thanNovember 3rd. On November 1st Bob calls John and acknowledges that he received the offer and says he will think about it and get back to him before November 4th.John says okay.On November 3rd before he receives an acceptance or rejection from Bob, John spots the same boat for sale with a different owner for $4,000. He immediately writes a letter revoking his offer to buy Bob's boat, sends it to Bob by fax.Bob, who is not at home and knows nothing about John's intended revocation of his offer to buy, sends an email on November 3rd from his laptop computer to John accepting his offer of $5,000.John is not aware of Bob'sacceptance and signs a contract to buy the other boat for $4,000. Is there a valid and enforceable contract between John and Bob?What is your basis for this conclusion? Is your opinion and the outcome different if John sent his revocation by fax and Bob saw it before he sent hisacceptanceemail?

what is your opinion?