The correspondence theory of truth holds that the truth of a statement is determined by its correspondence to the actual state of affairs in the world.

The coherence theory of truth views truth as a property of a system of beliefs or statements that are mutually consistent and supportive.

The pragmatic theory of truth evaluates the truth of a statement based on its practical consequences and its ability to guide successful action.

The deflationary theory of truth argues that the concept of truth is too complex and elusive to be captured by a single definition.

The performative theory of truth treats statements as actions that perform a function in the world, rather than as descriptions of reality.

The verification theory of meaning holds that the meaning of a statement is determined by the conditions under which it can be verified or falsified.

Popper's falsification theory argues that scientific progress is driven by the process of falsifying hypotheses through rigorous testing.

Skepticism challenges the possibility of attaining objective and certain knowledge about the world, raising doubts about the reliability of our senses and the validity of our beliefs.

The correspondence theory of truth originated in ancient Greek philosophy, particularly with Plato and Aristotle, who emphasized the importance of aligning statements with reality.

Logical Positivism, a 20th-century philosophical movement, emphasized the coherence and consistency of statements as criteria for their truth.

William James, a prominent American philosopher, is widely credited with developing the pragmatic theory of truth, which emphasizes the practical consequences and usefulness of statements.

The deflationary theory of truth is often associated with Analytic Philosophy, a 20th-century philosophical movement that emphasizes the analysis of language and concepts.

J.L. Austin, a British philosopher, developed the performative theory of truth, which views statements as actions that perform a function in the world.

The verification theory of meaning was championed by members of the Vienna Circle, a group of philosophers and scientists who emphasized the importance of logical analysis and empirical verification.

Karl Popper's falsification theory is primarily concerned with epistemology, the study of knowledge and how we acquire it, particularly in the context of scientific inquiry.