

If something "goes without saying," why do people still say it?
Common sense is eminently practical... it does not strive for a precision which is alien to its domain.
Think of how stupid the average person is, and then realise half of them are stupider than that.
Common sense is judgment without reflection, shared by an entire class, an entire nation, or the entire human race.

Common sense is by no means irrelevant in complex situations... rather, it is in complex situations that common sense, or at least prudence, seems to be most desirable.
Did you hear there is a coin shortage in America?We're running out of common cents
Common sense is a leveling downward to our dullest perception such that the commonest sense is the sense of men asleep, which they express by snoring.