The Problem of Everything: Domain Ambiguity in Philosophical Universal Claims

Universal expressions such as “everything”, “all,” or “in all possible worlds” play a central role in philosophical argumentation. Yet outside formal logic these expressions are frequently used without explicit specification of their domain of quantification. This paper argues that unrestricted uses of the term everything often conceal implicit domain restrictions and lead to epistemically unstable conclusions. By comparing philosophical discourse with formal practices in logic and scientific reasoning, the paper shows that many universal philosophical claims implicitly rely on incomplete information about their domain. Clarifying this issue helps distinguish between legitimate universal generalizations and rhetorical extensions of local models.