Sure, but how often do you see each of the following sentences in some kind of logic discussion: 2+2=3 2+2=4 2+2=5 2+2=6 2+2=7

I have seen the first and third from time to time, the second more frequently than any other, and virtually never see 2+2 = n for n > 5. Not all statements are shown with equal frequency. My guess is that the percentage of the time when "2+2 = x" is written in contexts where the statement is for a true/false logic proposition rather than an equation x = 4 is more common than all other values put together.