Well, here's one, but I'll have to set it up: I was in statistics for psychological research the other day and our teacher was telling us that we only needed 2 decimal places in our answers, it'd save him time grading and they'd be easier to write down. I asked him if he preferred them rounded or truncated. Cue awkward 10 second silence by the class as people try to find out what truncated means. Then someone asked what it was. So... gonna go with that.