Logic. Deduction and Cognitive Science. Reasoning with Propositions. Conditionals. Relational Reasoning. One Quantifier at a Time: The Psychology of Syllogisms. Many Quantifiers: Reasoning with Multiple Quantification. Meta-Deduction. How to Draw Parsimonious Conclusions: An Algorithm Based on Models. Beyond Deduction: Rationality, Non - Monotonicity, and Everyday Reasoning.