Combining Philosophers

All the ideas for Pherecydes, Phil Dowe and Dag Prawitz

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10 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
13831 Logic is based on transitions between sentences [Prawitz]
5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence
13827 Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz]
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
13825 Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]
5. Theory of Logic / H. Proof Systems / 4. Natural Deduction
13823 In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]
5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models
13826 Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]
26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / c. Ultimate substances
22745 Pherecydes said the first principle and element is earth [Pherecydes, by Sext.Empiricus]
26. Natural Theory / C. Causation / 4. Naturalised causation
4787 Causation interaction is an exchange of conserved quantities, such as mass, energy or charge [Dowe, by Psillos]
14586 Physical causation consists in transference of conserved quantities [Dowe, by Mumford/Anjum]
26. Natural Theory / D. Laws of Nature / 9. Counterfactual Claims
4788 Dowe commends the Conserved Quantity theory as it avoids mention of counterfactuals [Dowe, by Psillos]
29. Religion / D. Religious Issues / 2. Immortality / a. Immortality
5883 Pherecydes was the first to say that the soul is eternal [Pherecydes, by Cicero]