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All the ideas for 'Logical Consequence', 'Queries to the 'Opticks'' and 'Db (ideas)'

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25 ideas

1. Philosophy / F. Analytic Philosophy / 5. Linguistic Analysis
4465 Note that "is" can assert existence, or predication, or identity, or classification [PG]
2. Reason / F. Fallacies / 1. Fallacy
4686 Fallacies are errors in reasoning, 'formal' if a clear rule is breached, and 'informal' if more general [PG]
2. Reason / F. Fallacies / 3. Question Begging
7415 Question-begging assumes the proposition which is being challenged [PG]
2. Reason / F. Fallacies / 6. Fallacy of Division
7414 What is true of a set is also true of its members [PG]
2. Reason / F. Fallacies / 7. Ad Hominem
6696 The Ad Hominem Fallacy criticises the speaker rather than the argument [PG]
3. Truth / H. Deflationary Truth / 3. Minimalist Truth
4687 Minimal theories of truth avoid ontological commitment to such things as 'facts' or 'reality' [PG]
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]
5. Theory of Logic / L. Paradox / 1. Paradox
6516 Monty Hall Dilemma: do you abandon your preference after Monty eliminates one of the rivals? [PG]
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]
10. Modality / B. Possibility / 6. Probability
24054 Everything has a probability, something will happen, and probabilities add up [PG]
11. Knowledge Aims / C. Knowing Reality / 1. Perceptual Realism / a. Naïve realism
3875 If reality is just what we perceive, we would have no need for a sixth sense [PG]
12. Knowledge Sources / A. A Priori Knowledge / 5. A Priori Synthetic
3876 If my team is losing 3-1, I have synthetic a priori knowledge that they need two goals for a draw [PG]
17. Mind and Body / E. Mind as Physical / 7. Anti-Physicalism / b. Multiple realisability
7734 Maybe a mollusc's brain events for pain ARE of the same type (broadly) as a human's [PG]
7735 Maybe a frog's brain events for fear are functionally like ours, but not phenomenally [PG]
23. Ethics / E. Utilitarianism / 4. Unfairness
3877 Utilitarianism seems to justify the discreet murder of unhappy people [PG]
26. Natural Theory / D. Laws of Nature / 1. Laws of Nature
16746 Principles of things are not hidden features of forms, but the laws by which they were formed [Newton]
27. Natural Reality / G. Biology / 2. Life
6126 Life is Movement, Respiration, Sensation, Nutrition, Excretion, Reproduction, Growth (MRS NERG) [PG]
28. God / A. Divine Nature / 4. Divine Contradictions
3873 An omniscient being couldn't know it was omniscient, as that requires information from beyond its scope of knowledge [PG]
3874 How could God know there wasn't an unknown force controlling his 'free' will? [PG]