Sometimes you're not ready to give the world quite what it wants. And that's okay, because the Earth is generously patient.
Assessment in this spirit does not concern assignment of grades or evaluation of whether instruction was effective. It's assessment designed squarely to feed into the learning process and make the learning stronger.
While you judge me by my outward appearance I am silently doing the same to you, even though there's a ninety-percent chance that in both cases our assumptions are wrong.