The Wall Street Journal:
Monkeys can reason by using analogy, it seems. In an experiment recently reported in the journal Psychological Science, baboons in a lab proved capable of realizing that a pair of oval shapes is “like” a pair of square shapes and “unlike” a pair made of two different shapes. This finding suggests that you can have analogy without language.
The experiment, run on 29 baboons by Joel Fagot of the University of Provence and Roger Thompson of Marshall College, found that the monkeys could ignore the fact that some symbols were more familiar from previous sessions and stick with the task of selecting those that came in pairs, and that they still partly recalled the skill after a year.
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