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Now you are in the subtree of TECHNOLOGY and MARKETS public knowledge tree. 

Unknowns - aware versus understand

https://en.wikipedia.org/wiki/There_are_unknown_unknowns

https://en.wikipedia.org/wiki/The_Unknown_Known

https://medium.com/@andreamantovani/known-knowns-known-unknowns-unknown-unknowns-leadership-367f346b0953

Known unknwon

https://en.wikipedia.org/wiki/The_Elephant_in_the_Brain