(logic) A fallacy whose error cannot be represented by the symbols used in formal logic.

plural of informal logic

(taxonomy) Sometimes used to indicate that a formerly accepted taxonomic group is considered not to be paraphyletic or polyphyletic

That branch of logic whose task is to develop non-formal standards, criteria, procedures for the analysis, interpretation, evaluation, criticism and construction of argumentation in everyday discourse.

plural of informal fallacy

partly informal, neither formal nor informal, semi-formal.

The process of creating information model.

plural of information science

An abstract but formal representation of entities including their properties, relationships and the operations that can be performed on them.

(US, law, finance) Information obtained by or from a person in a position of trust (a director, an employee, a consultant) that affects the price of publicly traded securities.