The three friends set up their camping site

The physicist and the mathematician go out to gather wood to get a fire going before the sun sets while the engineer sets up the tents.
When both of them return, the engineer is pretty pissed and says:

"You faggots took too long, I've been setting this shit for almost an hour and my boots are all wet, it must've rained before we got here so we should be expecting heavy rain in the morning"

The phycisist rolls his eyes and is about to say something before the mathematician intervenes.

"Don't worry friend, we don't know for certain if it's gonna rain again or not!"

The engineer replies:

"How so?"

The mathematician continues:

"It is a logical fallacy to assume things get wet because it rains, things do get wet when it rains but rain isn't a necessary condition for wetness to occur"

The physicist smirks at the retarded argument of his fellow mathematician

"Typical mathematician, always spitting out useless true nonsense"

The engineer makes his way up to the mathematician and falls to his knees

"Is that cock as big as that brain, big boy?"