Hugh Mellor

(1938 - 2020)

The two other commentators, being, like Professor Laudan, scholars, have commented on the whole of his book. As a mere philosopher, I may perhaps be forgiven if I get little further than the first chapter of Progress and Its Problems.We know that the practice of science increases our knowledge and understanding of things and events, and consequently our capacity to predict and control them. That is why the practice of science interests philosophers who are concerned to say how such knowledge and understanding, such capacity for prediction and control, can be acquired. It challenges them to show why scientific practice should deliver these cognitive goods. Some who decline the challenge, or fail to meet it, may deny that it does deliver the goods; but their conscious practice, of preferring aircraft to broomsticks for flight and telephones to telepathy for communication, belies the sincerity of their denials.

This selection of D. H. Mellor's work demonstrates the wide ranging originality of his work. It gathers together sixteen major papers on related topics. Together they form a complete modern metaphysics. The first five papers are on aspects of the mind: on our 'selves', their supposed subjectivity and how we refer to them, on the nature of conscious belief and on computational and physicalist theories of the mind. The next five papers deal with dispositions, natural kinds, laws of nature and how they involve natural necessity, universals and objective chances, and the relation between properties and predicates. Then follow three papers about the relations between time, change and causation, the nature of individual causes and effects and of the causal relation between them, and how causation depends on chance. The last three papers discuss the relation between chance and degrees of belief, give a solution to the problem of induction, and argue for an objective interpretation of decision theory.

I dispute a widespread contrast between the sciences and the humanities that undervalues the latter compared to the former. This contrast assumes that science is more valuable than the humanities because it is more useful, an assumption I reject on the grounds that science is not more useful than the humanities and the value of usefulness, being instrumental, depends on the non-instrumental value of what it's usefulness for. I conclude that science is not made more valuable than the humanities either by its instrumental or by its non-instrumental value.

The paper looks at the semantics and ontology of dispositions in the light of recent work on the subject. Objections to the simple conditionals apparently entailed by disposition statements are met by replacing them with so-called 'reduction sentences' and some implications of this are explored. The usual distinction between categorical and dispositional properties is criticised and the relation between dispositions and their bases examined. Applying this discussion to two typical cases leads to the conclusion that fragility is not a real property and that, while both temperature and its bases are, this does not generate any problem of overdetermination.