Combining Philosophers

Ideas for H.Putnam/P.Oppenheim, Ludwig Wittgenstein and Will Sommers

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34 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
23502 Logic fills the world, to its limits [Wittgenstein]
18724 In logic nothing is hidden [Wittgenstein]
16908 We can dispense with self-evidence, if language itself prevents logical mistakes [Jeshion on Wittgenstein]
23504 Logic concerns everything that is subject to law; the rest is accident [Wittgenstein]
5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
6428 Wittgenstein is right that logic is just tautologies [Wittgenstein, by Russell]
5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
11062 Logic is a priori because it is impossible to think illogically [Wittgenstein]
5. Theory of Logic / B. Logical Consequence / 3. Deductive Consequence |-
18277 If q implies p, that is justified by q and p, not by some 'laws' of inference [Wittgenstein]
5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
18162 The propositions of logic are analytic tautologies [Wittgenstein]
5. Theory of Logic / C. Ontology of Logic / 2. Platonism in Logic
7537 Wittgenstein convinced Russell that logic is tautologies, not Platonic forms [Wittgenstein, by Monk]
5. Theory of Logic / C. Ontology of Logic / 4. Logic by Convention
18709 Laws of logic are like laws of chess - if you change them, it's just a different game [Wittgenstein]
5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction
23496 Two colours in the same place is ruled out by the logical structure of colour [Wittgenstein]
18736 Contradiction is between two rules, not between rule and reality [Wittgenstein]
5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic
18154 The sign of identity is not allowed in 'Tractatus' [Wittgenstein, by Bostock]
13429 The identity sign is not essential in logical notation, if every sign has a different meaning [Wittgenstein, by Ramsey]
5. Theory of Logic / E. Structures of Logic / 1. Logical Form
18276 A statement's logical form derives entirely from its constituents [Wittgenstein]
18743 Wittgenstein says we want the grammar of problems, not their first-order logical structure [Wittgenstein, by Horsten/Pettigrew]
18268 Apparent logical form may not be real logical form [Wittgenstein]
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
10905 My fundamental idea is that the 'logical constants' do not represent [Wittgenstein]
6563 'And' and 'not' are non-referring terms, which do not represent anything [Wittgenstein, by Fogelin]
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
23493 'Not' isn't an object, because not-not-p would then differ from p [Wittgenstein]
18723 We may correctly use 'not' without making the rule explicit [Wittgenstein]
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / d. and
18718 Saying 'and' has meaning is just saying it works in a sentence [Wittgenstein]
5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
7784 'Object' is a pseudo-concept, properly indicated in logic by the variable x [Wittgenstein]
5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic
15105 F(x) walked into a bar. The barman said.. [Sommers,W]
5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
23506 Names are primitive, and cannot be analysed [Wittgenstein]
18727 A person's name doesn't mean their body; bodies don't sit down, and their existence can be denied [Wittgenstein]
4139 Naming is a preparation for description [Wittgenstein]
5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive
4946 A name is not determined by a description, but by a cluster or family [Wittgenstein, by Kripke]
5. Theory of Logic / F. Referring in Logic / 1. Naming / c. Names as referential
7089 A name is primitive, and its meaning is the object [Wittgenstein]
5. Theory of Logic / G. Quantification / 1. Quantification
9467 Wittgenstein tried unsuccessfully to reduce quantifiers to conjunctions and disjunctions [Wittgenstein, by Jacquette]
5. Theory of Logic / H. Proof Systems / 1. Proof Systems
15089 Logical proof just explicates complicated tautologies [Wittgenstein]
5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth
13830 Logical truths are just 'by-products' of the introduction rules for logical constants [Wittgenstein, by Hacking]
5. Theory of Logic / K. Features of Logics / 1. Axiomatisation
19292 Logic doesn't split into primitive and derived propositions; they all have the same status [Wittgenstein]
5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / a. The Liar paradox
6569 'This sentence is false' sends us in a looping search for its proposition [Wittgenstein, by Fogelin]