Carnap's internal/external distinction itself presupposes that reality divides neatly into framework-relative and framework-independent questions, which is a substantive ontological thesis.

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Carnap: Rudolf Carnap (1891-1970) was a highly influential German-American philosopher who believed that many traditional philosophical problems could be solved by carefully analyzing the language we use to talk about them. He pioneered the idea that philosophy should work closely with science and mathematics, using precise logical methods to clarify confused thinking. His work fundamentally changed how philosophers approach their discipline, making language analysis and logical rigor central to philosophical practice.
Framework-independent(describing whether logical truths apply universally): True or valid no matter which system of rules or assumptions you're using; not dependent on your chosen approach.
Framework-relative(philosophy of mathematics): Something that is true or makes sense only within a particular system or set of rules, rather than being true in all situations.
Internal/external distinction(the core concept Carnap created): The idea that there's a difference between questions asked *inside* a framework (like using the rules of math within mathematics) versus questions asked *about* the framework itself (like whether math is 'really true' in the world).

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