Bob Evans called in sick one day. While at home he noticed that someone was installing a pool in his back yard but said nothing. He had no agreement with the pool installer. At the end of the day, when he went outside, the installer said Heres your bill, Mr. Smith. Bob said, Mr. Smith lives next door. Thanks for the pool, sucker, and tore up the bill. The next day, the confused pool installer mistakenly placed another pool at the wrong address. This time the home owner, Mr. Jones, was not at home. Does a contract exist in either case? Why of why not? Under what theory will the pool installer try to collect from each home owner? Will he be successful? If the legal outcomes are different, what made them different?