Knowledge refers to the means of knowledge in science: the idea of gathering the main amount. How to address in textbooks in the library, which is located outside of the people who came to accumulate so that the generations after learning.
Knowledge refers to the knowledge of the principles, concepts, science, including how to address the textbooks. In the library Which are external to the individual Implicit, to allow future generations to learn.
Knowledge, mean, mean knowledge in science: concepts, principles, methods, in the book in the library, which is located outside the individual. Accumulated together for future generations to learn.