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Analogy (from
Greek ἀναλογία,
analogia, "proportion") is a
cognitive process of transferring
information or
meaning from a particular subject (the analogue or source) to another (the target), or a
linguistic expression corresponding to such a process. In a narrower sense, analogy is an
inference or an
argument from one particular to another particular, as opposed to
deduction,
induction, and
abduction, where at least one of the
premises or the conclusion is general. The word
analogy can also refer to the relation between the source and the target themselves, which is often, though not necessarily, a , as in the
biological notion of analogy.