- See also changes related to Knowledge, or pages that link to Knowledge or to this page or whose text .
- Philosophy : The study of the meaning and justification of beliefs about the most general, or universal, aspects of things.
- Epistemology : Philosophical discipline dealing with the nature of knowledge and justification of beliefs.
- Art : Application of human creativity to existing materials, resulting in a new object or experience.
- Religion : Belief in, and systems of, worshipful dedication to a superhuman power or belief in the ultimate nature of existence.
- Science : The organized body of knowledge based on non–trivial refutable concepts that can be verified or rejected on the base of observation and experimentation
- Ignorance : The relative lack of knowledge, either with respect to a specific subject, or in general.
- Discourse on Method : Philosophical and mathematical treatise published by René Descartes in 1637, best known as the source of the famous quotation 'Je pense, donc je suis' ('I think, therefore I am').
- Logical positivism : A school of philosophy that combines positivism—which states that the only authentic knowledge is scientific knowledge—with some kind of logical analysis, which is similar, but not the same as logicism.
- Induction (philosophy) : Inference from observations, subject to revision when further observations are made.
- René Descartes : French 17th-century philosopher, mathematician and scientist, author of the Discourse on Method.
- Karl Popper : (1902–1994) One of the most influential philosophers of science of the 20th century.