PolitiFlub: Comparing apples and appanges?

PolitiFact determines whether Mitt Romney flip-flopped on President Obama's stimulus plan:

Our ruling
It’s misleading to say that Romney flip-flopped on supporting "the president's Recovery Act." At the time of the CNN interview, no Obama stimulus bill had been introduced, much less enacted. With such complex bills, the devil’s in the details.

But before Obama took office, Romney had spoken in favor of a stimulus -- particularly if the stimulus in question had been passed when a Republican was in the White House. We rate this a Half Flip.

 So he never supported Obama's stimulus but half-flipped on supporting Obama's stimulus.

That's because he supported some type of stimulus according to the description he gave prior to Obama taking office.

This is a little like flip-flopping on Pepsi cola.  You've never liked Pepsi cola, but you do drink Coca-cola.  Since you like Coca-cola you've half-flipped on liking Pepsi cola.

It makes perfect sense once you think about it.