We consider reasoning about prefactual possibilities in the future, for example, “if I were to win the lottery next year I would buy a yacht” and counterfactual possibilities, for example, “if I had won the lottery last ...

We report three experiments to test the possibilities reasoners think about when they understand a con-ditional of the form ‘A only if B’ compared to ‘if A then B’. The experiments examine conditionals in the indicative ...