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Full Idea
Frege persistently neglected the question of the domain of quantification, which proved in the end to be fatal.
Gist of Idea
Frege always, and fatally, neglected the domain of quantification
Source
comment on Gottlob Frege (works [1890]) by Michael Dummett - Frege philosophy of mathematics Ch.16
Book Ref
Dummett,Michael: 'Frege: philosophy of mathematics' [Duckworth 1991], p.207
A Reaction
The 'fatality' refers to Russell's paradox, and the fact that not all concepts have extensions. Common sense now says that this is catastrophic. A domain of quantification is a topic of conversation, which is basic to all language. Cf. Idea 9874.
Related Idea
Idea 9874 Contradiction arises from Frege's substitutional account of second-order quantification [Dummett on Frege]