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Doubts about Mathematical Logic
Confrontation and Objectivity
Varieties of Ethical Subjectivism
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able according Achinstein alternative theories argument assertion assume assumptions about Nature bridge-law Brownian movement Butts Chapter choose classical statement calculus commensurable compatible concepts condition of meaning confrontation principle connection consistency condition context corresponding supplementary laws criticism description of indirect Einstein's special theory emotion example experiment fact false theories falsified Feyerabend 1965b finite number Foundations of Mathematics incommensurable indirect testing infinite interpretation invent investigate J. L. Mackie kind of test logically incompatible mass mathematical logic meaning invariance measurements ment meta-ethical claim misuse moral judgements naive subjectivism native speakers Newton's mechanics normative ethical number of points objective observation language observational core p v q particles phenomenological thermodynamics pluralist methodology Popper pragmatic theory predicate logic predictions properties reasonable relativism relevant result rule of inference sentence Shapere statistical mechanics tautology theoretical pluralism theory of observation theory of relativity thereby tion truth function truth table truth values truth-functional utterances validity Westermarck