# cogency

101

**Necessary and sufficient condition**— This article is about the formal terminology in logic. For causal meanings of the terms, see Causality. In logic, the words necessity and sufficiency refer to the implicational relationships between statements. The assertion that one statement is …102

**Description logic**— (DL) is a family of formal knowledge representation languages. It is more expressive than propositional logic but has more efficient decision problems than first order predicate logic. DL is used in artificial intelligence for formal reasoning on …103

**Metamathematics**— is the study of mathematics itself using mathematical methods. This study produces metatheories, which are mathematical theories about other mathematical theories. Metamathematical metatheorems about mathematics itself were originally… …104

**Function (mathematics)**— f(x) redirects here. For the band, see f(x) (band). Graph of example function, In mathematics, a function associates one quantity, the a …105

**Friedrich Heinrich Jacobi**— (25 January, 1743 10 March, 1819), was a German philosopher notable for coining the term nihilism and promoting it as the prime fault of Enlightenment thought and Kantianism.sep entry|friedrich jacobi] Instead of speculative reason, he advocated… …106

**Explanation**— An explanation is a description which may clarify causes, , and consequences of a certain object, and a phenomenon such as a process, a state of affairs. This description may establish rules or laws, and may clarify the existing ones in relation… …107

**Transformation problem**— In 20th century discussions of Karl Marx s economics the transformation problem is the problem of finding a general rule to transform the values of commodities (based on labour according to his labour theory of value) into the competitive prices… …108

**List of psychology topics**— This page aims to list all topics related to psychology. This is so that those interested in the subject can monitor changes to the pages by clicking on Related changes in the sidebar. It is also to see the gaps in Wikipedia s coverage of the… …109

**Greek Anthology**— The Greek Anthology (also called Anthologia Graeca or, sometimes, the Palatine Anthology ) is a collection of poems, mostly epigrams, that span the classical and Byzantine periods of Greek literature.While papyri containing fragments of… …110

**Critical thinking**— is the process or method of thinking that questions assumptions. It is a way of deciding whether a claim is true, false, or sometimes true and sometimes false, or partly true and partly false. The origins of critical thinking can be traced in… …