"If it walks like a duck,and quacks like a duck,it must be a duck..." This expression best captures the essence of the

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The expression "If it walks like a duck, and quacks like a duck, it must be a duck" reflects the representativeness heuristic. This heuristic involves making judgments based on how closely an individual or situation matches our prototypes or schemas for a particular category. In this case, the characteristics of "walking" and "quacking" are highly representative of a duck, and so we make the judgment that the thing in question must be a duck.

"If It Walks Like a Duck,and Quacks Like a Duck,it