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Implication/Conditional/Ethics/Action/Nozick: Problem: a conditional is no implication (entailment): therefore, when a situation is logically possible in which A is wrong, this does not show the falsity of: (3) If A was not correct, S would not do A - and the logical possibility that A is mandatory, and the person still does not dot it, does not show the falsity of: (4) If A was mandatory, S would do A. - E.g. that someone is corrupt does not mean that one offered him enough. - (see above: brains in a vat/Knowledge, chair) -> Non-closedness.
Philosophical Explanations Oxford 1981
The Nature of Rationality 1994