After years of work, some programmers unveil a new supercomputer. They say it knows everything.

A skeptical man asks the computer, “Where is my father?”

The computer thinks, then says, “Your father is fishing in Michigan.”

The man laughs. “See? I knew this was nonsense. My father has been dead for 20 years.”

“No,” the computer says. “Your mother’s husband has been dead for 20 years. Your father just landed a three-pound trout.”