Gotta ask- who brought this to your attention? How are they the final word or
got you questioning yourself?
I far as I know those(cyan, magenta,yellow) are the primary colors for
printers. Actually I've heard that there a more than 2 types of color wheels.
A while back someone posted a few wonderful sites on color info and I remember
reading about the different color wheel. But for school and basic artist
practice. I think red, yellow,and blue are just fine.