Optometrism

Does anyone else feel unsettled about the question "Is the glass half full or half empty?" Half full means half empty. There's no difference. Any difference you see is reading too much into it. It's like when I get into an argument and someone says, "That's what you said, but what you implied was..."
You get a related problem with lotteries. Optimists say, "Well, it's possible!" To which I reply, "No one ever said it wasn't. I just said it's very, very improbable." And then they call me Mr. Grouchy.