Reasoning About Knowledge
If a logic includes formulae that mean that something is not known, this logic should not be monotonic. Indeed, learning something that was previously not known leads to the removal of the formula specifying that this piece of knowledge is not known. This second change (a removal caused by an addition) violates the condition of monotonicity. A logic for reasoning about knowledge is the autoepistemic logic.
Read more about this topic: Non-monotonic Logic
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“Acts themselves alone are history.... Tell me the acts, O historian, and leave me to reason upon them as I please; away with your reasoning and your rubbish! All that is not action is not worth reading.”
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“That observation which is called knowledge of the world will be found much more frequently to make men cunning than good.”
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