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|Description=A discipline ''A'' is characterized by a non-empty set of [[Core Question| core questions]] ''Q_CA'' and a [[Delineating Theory| delineating theory]] stating that ''Q_CA'' are the core questions of the discipline.[[CiteRef::Patton and Al-Zayadi (2021)]]

The [[Scientific Mosaic|scientific mosaic]] consists of [[Theory|theories]] and [[Question|questions]].[[CiteRef::Barseghyan (2015)]][[CiteRef::Barseghyan (2018)]][[CiteRef::Rawleigh (2018)]][[CiteRef::Sebastien (2016)]] As a whole, a discipline ''A'' consists of a set of accepted questions''Q_A'', and the theories which provide answers to those questions, or which those questions presuppose. [[CiteRef::Patton and Al-Zayadi (2021)]] Questions form hierarchies, with more specific questions being [[Subquestion| subquestions]] of more general questions. Theories find a place in these hierarchies, since each theory is an attempt to answer a certain question, and each question presupposes certain theories. Because of such hierarchical relations, it is possible to characterize a discipline by identifying a set of [[Core Question| core questions]], ''Q_CA''. These core questions are judged by some [[Epistemic Agent| agent]] to be related to one another, essential to a discipline, and definitive of its boundaries. The other questions of a discipline are subquestions of its core questions.

A set, as such, can't be part of a scientific mosaic consisting of theories and questions. We, therefore, take a discipline to be defined by a [[Delineating Theory| delineating theory]] that identifies the set of core questions ''Q_CA'' characterizing that discipline.