Digital BW, The Print

Austin writes:

> You do NOT have only the red element (unless
> it's only red, that is), you have three values.

"Unless it's only red" is sufficient to prove the point.  And in any case,
even with three values, you still have the same problem; see my trivial
example for yellow light.  Jon appears to be a better mathematician than I
am (which isn't difficult, I'll admit), and perhaps his explanation will be
clearer to you than mine.  I understand the concepts perfectly, but I hate
math.