Occam's Razor

Logo for a card game that takes it's name from the ironically complicated principle: http://en.wikipedia.org/wiki/Occam's_razor

Basically, the principle states that a theory that makes few assumptions is more likely to be correct than one that makes many assumptions.

i.e. "Faced with two possible explanations for an empty fridge, hungry roommates or aliens, Occam's Razor suggests we choose the first option." – Wikipedia