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Adding apples and oranges: investigators’implicit theories about personal relationships
Book chapter

Adding apples and oranges: investigators’implicit theories about personal relationships

Steve Duck
Accounting for Relationships: Explanation, representation and knowledge, pp.215-224
Routledge
2026
DOI: 10.4324/9781003768067-15

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Abstract

“You can’t add apples and oranges,” they used to tell us at school. They did not go on to talk about the nonequivalence of categories, the usefulness of superordinate classes or the value of reconceptualizing incomparable items as members of such superordinate classes so that they could be added - but we eight-year-olds knew that that is what they really meant.

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