Wrong Number

Today Doc decided to look up an old college buddy of his. After spending a while on Google he obtained both address and phone number. He hurriedly called, made contact , and they began to talk about old times. After about 20 minutes they discovered that they were not old college buddies and in fact didn't even know each other...same names...different people. They laughed and talked for another 15 minutes.  BTW this buddies name is of all things "Tom Sawyer".