A 50-year-old surgeon was the sole owner of a parcel of residential real estate. She wanted her eldest son to have this parcel after she died. The mother properly executed a legal deed, designating him as the grantee to the property. "I have put the deed in the top, left-hand drawer of my desk," she told her son. "After I have died, you will find the deed there, and the property will be yours and yours alone." Twenty years later, she passed away. The son found the executed deed in her desk drawer. This fact pattern shows: