"It's apples and oranges... you can't compare them."  We've all made the analogy. I personally am frequaently guilty of making this false statement.  Clearly you can, as the infographic below demonstrates. I've now been learned.  From now on, I've updated my personal inventory of cliché phrases to modify this analogy to say, "You can't compare apples and, oh, I dunno... rectal thermometers." And until I see an inforgraphic to prove otherwise, I'm sticking to it.

Infographic by Smarter.org