K nowledge is a familiarity, awareness or understanding of someone or something, such as facts , information , descriptions , or skills , which is acquired through e xperiance or e ducation by perceiving , d iscovering , or l earning . 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. [1] In philosophy , the study of knowledge is called epistemology ; the philosopher Plato famously defined knowledge as " justified true belief ", though this definition is now agreed by most analytic philosophers to be problematic because of the Gettier problems . However, several de...
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