Order of authorship is alphabetical, as the authors contributed equally. Tobias Schröder was awarded a research fellowship by the Deutsche Forschungsgemeinschaft (SCHR 1282/1-1) to support this work. Paul Thagard’s work is supported by the Natural Sciences and Engineering Research Council of Canada. We would like to thank Chris Eliasmith, Zhu Jing, and anonymous reviewers for comments on an earlier version of the manuscript. *Address correspondence to
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