Note that "class" isn't actually defined by the rules. It could just as easily be "type", or even "set". If the rules state that something is a class of asset, that doesn't really tell us anything we didn't already know.
Now, here's what the key thing to realize is, as I see it. An asset only exists if it is defined by the rules. Ribbons are defined by the rules, and they're defined as having colors. Colors do *not* only exist if they are defined by the rules; they exist independently of them. There are only two ways for White Ribbons to cease to exist: white ceasing to be a color (which it did not do), and ribbons ceasing to be defined by the rules. —Tanner L. Swett, beginning to get emotionally attached to the side he's arguing for, which, as everyone knows, is a bad thing