Adding 4.0241 to TLP

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Abstract

Tractatus 4.024 inspired the dominant semantics of our time: truth-conditional semantics. This is focused on possible worlds: the content ofpis theset of worlds wherepis true. It has become increasingly clear that such an accountis, at best, defective: we need an “independent factor in meaning, constrainedbut not determined by truth-conditions” (Yablo 2014: 2), because sentences can bedifferently true at the same possible worlds. I suggest a missing comment which,had it been included in theTractatus, would have helped semantics get this rightfrom the start. This is my 4.0241: “Knowing what is the case if a sentence is trueis knowing its ways of being true”: knowing a sentence’s truth possibilitiesandwhat we now call its topic, or subject matter. I show that the famous “fundamentalthought” that “the ‘logical constants’ do not represent” (4.0312) can be understoodin terms of ways-based views of meaning. Such views also help with puzzling claimslike 5.122: “Ifpfollows fromq, the sense of ‘p’ is contained in that of ‘q’ ”, whichare compatible with a conception of entailment combining truth-preservation withthe preservation of topicality, or of ways of being true.
Original languageEnglish
Title of host publicationPhilosophy of Logic and Mathematics
Subtitle of host publicationProceedings of the 41st International Ludwig Wittgenstein Symposium
EditorsGabriele M. Mras, Paul Weingartner, Bernhard Ritter
Place of PublicationBerlin
Publisherde Gruyter
Pages415-428
ISBN (Electronic)9783110657883
ISBN (Print)9783110654301, 9783110763478
DOIs
Publication statusPublished - 18 Nov 2019

Publication series

NamePublications of the Austrian Ludwig Wittgenstein Society
Volume27

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