It's "Bellisario's Law," named after Donald Bellisario, creator of "Quantum Leap" - as mentioned - and other TV shows. "Bellisarius" was/is the name of his production company. I believe the "law" was born when he answered a wide variety of nitpicky questions about "Quantum Leap" with something like: "Don't think about it too hard. It's just a TV show."

Ebony the Black Dragon

"Life is like an anole. Sometimes it's green. Sometimes it's brown. But it's always a small Caribbean lizard."