I see in this thread that a number of people are talking past each other, each with a different subtle sub definition of the word "know". I know of 7 basic sub

I see in this thread that a number of people are talking past each other, each with a different subtle sub definition of the word "know". I know of 7 basic subcategories of know - all but the last susceptible to phrasing: (1) Knowledge that is immediately accessible at great depth and can be traversed quickly (2) Knowledge that is not immediately accessible but resides in the unconscious. It surfaces in dreams, showers and intuition. (3) Knowledge that is not immediately accesible but can be so quickly understood from a search (physical or digital) that it might as well have been remembered. Truly, the old fashioned idea that all your knowledge can only be kept inside your head is quaint. (4) Knowledge that is not had but can be quickly acquired due to the similarity of the underlying structure to already possessed knowledge. With speed of acquisition proportional to similarity. (5) Knowledge that is not had but can be acquired due to available learning strategies, knowledgebase and skill in acquiring knowledge. (6) Knowledge that will be had in the distant future (7) Knowledge that can not be gained due to difference in interests, lack of motivation or sufficient strength of reason, entrenched mode of thinking and set of beliefs which inhibit deftness with abstraction and for a very small few - reasons of biology. Knowledge that cannot be accessed by Human Brains. For many cases, the level 4 definition of knowing is sufficient and anything above should be good enough for almost all problems.