Nescience n. : Want of knowledge; ignorance; agnosticism.

Example:
Give me a problem that will solve to 15?

Taxonomy
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Defination from the web:
nescience from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "nescience" and related topics at Britannica.com. Pronunciation Symbols. Share this entry: Link to this page: Cite this page: Products ...