A term coined by
Michael Stevens of Vsauce, Boil-o is an invisible, undetectable, unverifiable/unfalsifiable substance that appears whenever things begin to boil. While, yes, the
phenomenon of boiling is perfectly explained without Boil-o, Boil-o is still there.
Boil-o is used as an example of
redundancy. If a phenomena is perfectly explained without something, why include the something?
"Johnny: Yo man, I'm cooking up some pasta,
you want some?
Mike: Yeah, sure, just start boiling the water.
Johnny: Don't you mean "apply BOIL-O to the water?"
Mike: For fucks sake, John,
I don't want to get into this philosophy shit, it's been a long day, just- just tell me when
you're done, alright?
Johnny: Jeez man, fine, I'll tell you when it's done.
Mike: Thank you.