[noonespecial]

Put it on the list with "lowest common denominator" and "begs the question". That battle is lost.

[danso]

I never feel guilty about sending this along: http://begthequestion.info/

Even if language and idioms change, we need more ways to describe fallacies of circular reasoning, not fewer.

[flukus]

Can you show an example of "lowest common denominator" being misused? I've never noticed it so fear I may be guilty of misusing it.

[tylan1]

The correct version is greatest common denominator. The lowest common denominator is usually 1.

[level3]

Maybe you're thinking of divisor instead of denominator?

[foota]

They're pretty much the same thing, some fractions are expressed as numerator/denominator

[level3]

Divisor in the sense of greatest common divisor is not the same as a denominator. More to the point, we may indeed care about greatest common divisors, but we also care about least common denominators (i.e. least common multiples)