Combining Philosophers

All the ideas for Gabriel M.A. Segal, Max J. Cresswell and Hans Reichenbach

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29 ideas

1. Philosophy / G. Scientific Philosophy / 1. Aims of Science
3123 Science is in the business of carving nature at the joints [Segal]
2. Reason / A. Nature of Reason / 5. Objectivity
22361 Contextual values are acceptable in research, but not in its final evaluation [Reichenbach, by Reiss/Sprenger]
2. Reason / A. Nature of Reason / 8. Naturalising Reason
3125 Psychology studies the way rationality links desires and beliefs to causality [Segal]
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / b. System K
14970 Normal system K has five axioms and rules [Cresswell]
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / c. System D
14971 D is valid on every serial frame, but not where there are dead ends [Cresswell]
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / g. System S4
14972 S4 has 14 modalities, and always reduces to a maximum of three modal operators [Cresswell]
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / h. System S5
14973 In S5 all the long complex modalities reduce to just three, and their negations [Cresswell]
4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula
14976 Reject the Barcan if quantifiers are confined to worlds, and different things exist in other worlds [Cresswell]
8. Modes of Existence / A. Relations / 4. Formal Relations / a. Types of relation
14974 A relation is 'Euclidean' if aRb and aRc imply bRc [Cresswell]
10. Modality / A. Necessity / 4. De re / De dicto modality
14975 A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell]
10. Modality / A. Necessity / 5. Metaphysical Necessity
3105 Is 'Hesperus = Phosphorus' metaphysically necessary, but not logically or epistemologically necessary? [Segal]
10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / b. Conceivable but impossible
3106 If claims of metaphysical necessity are based on conceivability, we should be cautious [Segal]
12. Knowledge Sources / B. Perception / 5. Interpretation
18278 Kant showed that our perceptions are partly constructed from our concepts [Reichenbach]
14. Science / D. Explanation / 3. Best Explanation / c. Against best explanation
3113 The success and virtue of an explanation do not guarantee its truth [Segal]
18. Thought / A. Modes of Thought / 4. Folk Psychology
3112 Folk psychology is ridiculously dualist in its assumptions [Segal]
18. Thought / C. Content / 5. Twin Earth
3108 If 'water' has narrow content, it refers to both H2O and XYZ [Segal]
3110 Humans are made of H2O, so 'twins' aren't actually feasible [Segal]
3124 Externalists can't assume old words refer to modern natural kinds [Segal]
18. Thought / C. Content / 6. Broad Content
3117 Concepts can survive a big change in extension [Segal]
3104 Must we relate to some diamonds to understand them? [Segal]
3103 Maybe content involves relations to a language community [Segal]
3111 Externalism can't explain concepts that have no reference [Segal]
3109 If content is external, so are beliefs and desires [Segal]
3116 Maybe experts fix content, not ordinary users [Segal]
18. Thought / C. Content / 7. Narrow Content
3121 If content is narrow, my perfect twin shares my concepts [Segal]
18. Thought / C. Content / 10. Causal Semantics
3118 If thoughts ARE causal, we can't explain how they cause things [Segal]
3119 Even 'mass' cannot be defined in causal terms [Segal]
26. Natural Theory / C. Causation / 5. Direction of causation
8410 A theory of causal relations yields an asymmetry which defines the direction of time [Reichenbach, by Salmon]
27. Natural Reality / D. Time / 2. Passage of Time / g. Time's arrow
14935 The direction of time is grounded in the direction of causation [Reichenbach, by Ladyman/Ross]