Resolving apparent contradictions: adults' and preschoolers' ability to cope with non-classical negation

If the logic of natural language negation were classical – a simple matter of true and false – then it would be a disaster to answer a question like Is this essay good? with Yes and no. The overwhelming majority of adults (N = 40) asked to resolve this apparent contradiction were found to do so by appealing to the structure of the essay (e.g. Its thesis was good but its argument was not). Three-year-olds (N = 24), when suitably prepared, also appealed to object structure to resolve a similar apparent contradiction. These results are discussed in relation to a non-classical logical model that can handle object structure.