Len writes, in reply to John Smyth:
>This should be stated "all squares are rectangles, but not all rectangles
>are squares." And by analogy, "all music is sound, but not all sound is
>music".
You know, it makes just as much sense the other way around: "All sound is
music, but not all music is sound." It's even a pun.
Steve Schwartz, putting the cat amongst the pigeons again