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Fantastic, love this article. An important issue that I wholeheartedly agree with.

Not knowing something simply means lack of knowlege. That is the standard human condition. We are born knowing nothing and have to learn everything that we will ever know.
I agree with you that teaching students to pass a test on a subject teaches them fear of failure. It does not teach them how to deal with failure or how to respond to failing at something. It does not teach them that failing at something is part of our life experience.