Saul Kripke summary

A priori knowledge, in Western philosophy since the time of Immanuel Kant, knowledge that is acquired independently of any particular experience, as opposed to a posteriori knowledge, which is derived from experience. The Latin phrases a priori (“from what is before”) and a posteriori (“from what

Truth, in metaphysics and the philosophy of language, the property of sentences, assertions, beliefs, thoughts, or propositions that are said, in ordinary discourse, to agree with the facts or to state what is the case. Truth is the aim of belief; falsity is a fault. People need the truth about the

Set theory, branch of mathematics that deals with the properties of well-defined collections of objects, which may or may not be of a mathematical nature, such as numbers or functions. The theory is less valuable in direct application to ordinary experience than as a basis for precise and adaptable

Logic, the study of correct reasoning, especially as it involves the drawing of inferences. This article discusses the basic elements and problems of contemporary logic and provides an overview of its different fields. For treatment of the historical development of logic, see logic, history of. For