Benford's Law: Passion is inversely proportional to the amount of real information available. (Gregory Benford)
Clarke's First Law: When a distinguished but elderly scientist states that something is possible he is almost certainly right. When he states that something is impossible, he is very probably wrong. (Arthur C Clarke)
Dilbert Principle: The most ineffective workers are systematically moved to the place where they can do the least damage: management. (Scott Adams)
Ellison's Law: The two most common elements in the universe are hydrogen and stupidity. (Harlan Ellison)
Fisher's Fundamental Theorem: The more highly adapted an organism becomes, the less adaptable it is to any new change. (R A Fisher)
Godwin's Law: As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one. (Mike Godwin)
Hanlon's Law: Never attribute to malice that which can be adequately explained by stupidity. (?Robert Heinlein)
Heisenbug Uncertainty Principle: Most production software bugs are soft: they go away when you look at them. (Jim Gray)
Lister's Law: People under time pressure don't think faster. (Timothy Lister)
Murphy's Law: If there are two or more ways to do something, and one of those ways can result in a catastrophe, then someone will do it. (Edward A Murphy)
Occam's Razor: The explanation requiring the fewest assumptions is most likely to be correct. (William of Occam)
Parkinson's Law: Work expands so as to fill the time available for its completion. (C Northcote Parkinson)
Pesticide Paradox: Every method you use to prevent or find bugs leaves a residue of subtler bugs against which those methods are ineffectual. (Bruce Beizer)
Spector's Law: The time it takes your favorite application to complete a given task doubles with each new revision. (Lincoln Spector)