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=====4.3.4.1. Learning=====
 
=====4.3.4.1. Learning=====
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<pre>
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Rules in a knowledge base, as far as their effective content goes, can be obtained by any mode of inference.  For example, a rule like
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B => A, "just Before it rains, the Air is cool",
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is usually induced from a consideration of many past events, as follows.
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C => B, "in Certain events, it is just Before it rains". (Case)
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C => A, "in Certain events, the Air is cool". (Fact)
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B => A, "just Before it rains, the Air is cool". (Rule)
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However, the same proposition could also be abduced as an explanation of a singular occurrence or deduced as a conclusion of a prior theory.
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</pre>
    
=====4.3.4.2. Transfer=====
 
=====4.3.4.2. Transfer=====
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