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Legend 3.

A = the Air is cool,
B = just Before it rains,
C = the Current situation,
D = a Dark cloud appears.

A is a major term,
B is a middle term,
C is a minor term,
D is a major term, associated with A.

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In this analysis of the first steps of Inquiry,
we have a complex or a mixed form of inference
that can be seen as taking place in two steps:

1.  The first step is an Abduction that abstracts a Case
    from a Fact and a Ru