This is the category of ''theory''.
In this encyclopedia, theories come in three main sub-types:
* [[:Category:Definition|Definitions]]: the definitions of termspropositions that attempt to define a certain term.
* [[:Category:Descriptive Theory|Descriptive Theories]]: propositions that attempt to describe (explain) something.
* [[:Category:Normative Theory|Normative Theories]]: propositions that attempt to prescribe (evaluate) something.