Because it seems as the rite word to use in response your OP. Is it not what you were describing?

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Right. Now I get your response.

Actually, it's not what I described. Your definition for ignorance isn't correct. My comment is about missing information though.

The wizard of earthsea

I'm betting that's a book. I think someone described it once, but I only remember it being one of two book series of which one more or less copied the magic system of the other. So, you lost me on the actual reference.