Logical Question: | willing | not[willing] |able | not[able] |

So what?

Sure there can: Ambivalent and/or apathetic.We can use those terms in certain scenarios where their descriptions are not unwilling or unable.But then, you could just re-describe the words so that they do fit. Still though, we can use the words in our way to make the scenario.

Sure they can, I'm willing to do it but I just don't care whether it gets done or not... so it may or may not get done depending on the circumstances and yet I'm willing. No, not necessarily. Unless you're tring to broaden the verb "to will" into a catch-all term. But then, you're just creating a tautology so you're really not saying much of anything at all. So whoopty-frickin'-doo. Huh? Are you seriously claiming there are no synonyms for those words? There's a thesaurus online....

Yeah, I did get that.I think you could set it up either way, depending on how you want to use the words. And I think that makes it a less interesting debate than the one about what Spock said in Star Trek... but that's just me.Not that that's gonna stop me from participating

But you "could" have those fall under willing and/or able if you use the words in that way. Like how Spock was using the term willing to mean/imply accomplishing the task, so, say, ambivalence could be consider as acting on your will to do it, thereby making you "unwilling", or you could consider it a problem that prevents your ability to do it, as in you can't do it because you're so ambivalent.