Combining Texts

All the ideas for 'Logical Consequence', 'The Wanderer and his Shadow' and 'A Study of Concepts'

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22 ideas

2. Reason / D. Definition / 13. Against Definition
12585 Most people can't even define a chair [Peacocke]
4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
10688 'Equivocation' is when terms do not mean the same thing in premises and conclusion [Beall/Restall]
5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
10690 Formal logic is invariant under permutations, or devoid of content, or gives the norms for thought [Beall/Restall]
5. Theory of Logic / B. Logical Consequence / 2. Types of Consequence
10691 Logical consequence needs either proofs, or absence of counterexamples [Beall/Restall]
5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=
10695 Logical consequence is either necessary truth preservation, or preservation based on interpretation [Beall/Restall]
5. Theory of Logic / B. Logical Consequence / 8. Material Implication
10689 A step is a 'material consequence' if we need contents as well as form [Beall/Restall]
5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth
10696 A 'logical truth' (or 'tautology', or 'theorem') follows from empty premises [Beall/Restall]
5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models
10693 Models are mathematical structures which interpret the non-logical primitives [Beall/Restall]
6. Mathematics / B. Foundations for Mathematics / 2. Proof in Mathematics
10692 Hilbert proofs have simple rules and complex axioms, and natural deduction is the opposite [Beall/Restall]
12. Knowledge Sources / B. Perception / 1. Perception
12581 Perceptual concepts causally influence the content of our experiences [Peacocke]
12. Knowledge Sources / B. Perception / 6. Inference in Perception
12579 Perception has proto-propositions, between immediate experience and concepts [Peacocke]
15. Nature of Minds / B. Features of Minds / 1. Consciousness / f. Higher-order thought
12586 Consciousness of a belief isn't a belief that one has it [Peacocke]
18. Thought / D. Concepts / 1. Concepts / b. Concepts in philosophy
18568 Philosophy should merely give necessary and sufficient conditions for concept possession [Peacocke, by Machery]
18571 Peacocke's account of possession of a concept depends on one view of counterfactuals [Peacocke, by Machery]
18572 Peacocke's account separates psychology from philosophy, and is very sketchy [Machery on Peacocke]
18. Thought / D. Concepts / 3. Ontology of Concepts / b. Concepts as abilities
12577 Possessing a concept is being able to make judgements which use it [Peacocke]
12578 A concept is just what it is to possess that concept [Peacocke]
12587 Employing a concept isn't decided by introspection, but by making judgements using it [Peacocke]
18. Thought / D. Concepts / 4. Structure of Concepts / b. Analysis of concepts
12584 An analysis of concepts must link them to something unconceptualized [Peacocke]
18. Thought / D. Concepts / 4. Structure of Concepts / f. Theory theory of concepts
9335 Concepts are constituted by their role in a group of propositions to which we are committed [Peacocke, by Greco]
19. Language / B. Reference / 1. Reference theories
9336 A concept's reference is what makes true the beliefs of its possession conditions [Peacocke, by Horwich]
26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / b. Limited purposes
4422 The end need not be the goal, as in the playing of a melody (and yet it must be completed) [Nietzsche]