In Theory

How many times have we heard or said those infamous words: "in theory that shouldn't be a problem"?

That's nice, but I don't live in Theory. I live in Boston.

Now, the only mental leap is to prepend the phrase "in theory" to anything that says "shouldn't be X" or "should be Y". "Should" is a word that indicates uncertainty - and that's a place we're going to want to test! After all, Theory is a pretty empty place.