+Metatheory is a [Theory](/wiki/theory) whose subject matter is another theory, exploring its fundamental nature and structure. It delves into the underlying principles, logical consistency, and philosophical implications of a given field of study, providing a [Framework](/wiki/framework) for understanding its foundations.
+## See also
+- [Philosophy](/wiki/philosophy)
+- [Logic](/wiki/logic)
+- [Formal System](/wiki/formal_system)
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