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Induction and deduction


In deductive reasoning, if something is true of a class of things in general, it is also true for all members of that class. Reasoning proceeds from the general to the particular with certainty.

In inductive inference, we go from the specific to the general. We make many observations, discern a pattern, make a generalization, and infer an explanation or a theory. Reasoning proceeds from the particular to the general with uncertainty.

In the crime fiction novel Presumed Dead, the investigation alternately employs induction speculatively and deduction conclusively.

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