ICC Profile

There is something puzzling about the profile reproduced above in the article: Three different color spaces are marked with red, green and blue outlines. These colors are clearly reproduced on my screen, and my inkjet can also print them. Yet, according to the diagram, they are outside the sRGB, AppleRGB, and Generic CMYK spaces.
How should I interpret the profile? Clearly, printers and monitors can produce more colors than it indicates!