Knowledge is a familiarity, awareness, or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning.
Knowledge can refer to a theoretical or practical understanding of a subject. It can be implicit (as with practical skill or expertise) or explicit (as with the theoretical understanding of a subject); it can be more or less formal or systematic. In philosophy, the study of knowledge is called epistemology; the philosopher Plato famously defined knowledge as “justified true belief”, though this definition is now thought by some analytic philosophers to be problematic because of the Gettier problems, while others defend the platonic definition. However, several definitions of knowledge and theories to explain it exist.
Knowledge acquisition involves complex cognitive processes: perception, communication, and reasoning; while knowledge is also said to be related to the capacity of acknowledgment in human beings.
To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.
Nicolaus Copernicus
To know; is to know that you know nothing. That is the meaning of true knowledge.
Socrates
