This article presents a fundamental advance in the theory of mental models as an explanation of reasoning about facts, possibilities, and probabilities. It postulates that the meanings of compound assertions, such as conditionals ("if") and disjunctions ("or"), unlike those in logic, refer to conjunctions of epistemic…

It has been proposed that children differ from adults in that children license a conjunctive inference to disjunctive sentences that lack any licensing expression. The proposal is that children infer "A and B" from sentences of the form "A or B." Although children's conjunctive interpretations of disjunction have been reported…

Past research has found that the judged likelihood of properties of modified nouns (baby ducks have webbed feet) is reduced relative to unmodified nouns (ducks have webbed feet). Experiments 1-3 replicate the modification effect and demonstrate that this effect is obtained when participants make dichotomous decisions about the truth of such…