In an argument by analogy, we begin with the premise that A has property P, and conclude that B has property P.What additional premise is necessary to reach this conclusion?

Question

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For an argument by analogy to be valid, it is necessary to establish that the two things being compared (A and B) are similar in relevant respects. This similarity provides the basis for inferring that because A has property P, B also has property P. Identicality or the presence of the property in other objects (C) or its frequency (B) are not required for the analogy to hold.

In an Argument by Analogy, We Begin with the Premise