I read this sentence today in Discover magazine:
People who grew up watching black and white television are more likely to dream in black and white than are people who grew up watching color.
Then later when I saw S, I wanted to share my new found knowledge with her, so I said:
Did you know that people who grew up watching black and white TV are more likely to dream in black and white.
Now that may be true, but it isn't what the magazine's sentence said. The magazine said if you put two people side by side, one who whatched black and white TV as a kid and one who watched color TV as a kid, if one of them dreams in black and white, the odds are that it is the one who watched black and white TV.
My sentence said if you asked someone who grew up watching black and white TV whether he dreamed in color, chances are good he'd say no.
If you don't find that difference as fascinating as I do, than either you don't hear the voices in your head, or you haven't exhausted your brain by spending too much time working with words.