Difference between tacit and explicit knowledge

Tacit knowledge is the knowing of things without knowing how you know; explicit knowledge is the knowing of things that you can explain. For example, most people can speak grammatically without being able to explain the rules of grammar. This is Tacit knowledge.
Tacit Knowledge is the knowledge your [co-worker or neighbor or associate] knows, but isn’t codified or written down; while Explicit Knowledge deals with knowledge that is written down and structured. For example, your co-worker knows how to fix Word when it chokes on an important document; but she is the only one. This is the Tacit Knowledge that Project Management tries to root out and codify. Once that knowledge is written down and saved somewhere it becomes explicit.
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• Dictionary of Philosophy of Mind: cognize; tacit knowledge
• Tacit knowledge – Wikipedia, the free encyclopedia.
• Implicit Knowledge at IT Toolbox
• Implicit Knowledge — Ayn Rand Lexicon.
• Implicit and explicit knowledge – @Everything2.com.
• Philosophy, Ethics, and Humanities in Medicine – Tacit knowledge as the unifying factor in evidence based medicine and clinical judgement (full paper)