Ideas from 'Counterfactuals' by David Lewis [1973], by Theme Structure

[found in 'Counterfactuals' by Lewis,David [Blackwell 2001,0-631-22425-4]].

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10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals
Lewis says indicative conditionals are truth-functional
10. Modality / B. Possibility / 9. Counterfactuals
In good counterfactuals the consequent holds in world like ours except that the antecedent is true
26. Natural Theory / D. Laws of Nature / 4. Regularities / b. Best system theory
A law of nature is a general axiom of the deductive system that is best for simplicity and strength