The philosophy of logic explores the nature, scope, and foundations of logic itself. It examines questions about what constitutes valid reasoning, the relationship between logic and language, and how logical systems can represent truth. Philosophers like Aristotle and Gottlob Frege have significantly influenced this field by developing formal systems and exploring the implications of logical principles. Additionally, the philosophy of logic investigates the connections between logic and other areas of philosophy, such as epistemology and metaphysics. It addresses issues like the nature of logical truth, the role of inference, and the distinction between different types of logic, including classical logic and non-classical logics.