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The Logical Reconstruction of the World (Aufbau) is oneof the major works of Rudolf Carnap in which he attempts to put an end to some of the traditional disputes in epistemology by using what he calls 'construction theory'. According to this theory, one or more constructional systems can be designed in which all the scientific and pre-scientific objects are logically made out of a limited number of basic elements. Carnap introduces some options for the basis of this system and chooses the domain of the autopsychological, i.e., the domain of private elementary experiences, among them and tries to construct all the concepts out of them. This phenomenalistic reduction sometimes is seen as embracing a Cartesian dualism of mind and body or even a mentalistic monism. However, in this paper, I shall try to show that the traditional dualist-monist debates are among those disputes that the construction theory aims to get rid of. I will show that Carnap's position on the mind-body problem is really close to what Davidson later termed as 'Anomalous Monism' and that this is why Carnap fails to complete his logical construction at a crucial step. Whenever possible, logical constructions are to be substituted for inferred entities.

The essay discusses Donald Davidson’s concept of anomalous monism in the framework of Husserlian phenomenology. It develops in four stages. Section 1 is devoted to a critical presentation of the argument for anomalous monism. Section 2 succinctly examines those Husserlian notions that best provide the ground for a discussion parallel to Davidson’s. In Sect. 3, the aporetic status of “mental causation” is analyzed by providing a genetic-phenomenological account of efficient causation. Section 4 draws some general conclusions concerning the kind of efficaciousness that must be attributed to consciousness and discusses the sense in which anomalous monism can be defended in a phenomenological framework, but not in a naturalistic one.

Anomalous Monism is a type of property dualism in the philosophy of mind. Property dualism combines the thesis that mental phenomena are strictly irreducible to physical phenomena with the denial that mind and body are discrete substances. For the anomalous monist, the plausibility of property dualism derives from the fact that although mental states, events and processes have genuine causal powers, the causal relationships that they enter into with physical entities cannot be explained by appeal to fundamental laws of nature. This doctrine about the relationship between mind and body was first explicitly defended by Donald Davidson in his paper “Mental Events,” though its root in the Western philosophical tradition go back at least as far as Spinoza. It was a topic of energetic debate and disagreement among English-speaking philosophers for the last thirty years of the twentieth century.

In his paper "Supervenience Revisisted", Simon Blackburn redeployed his novel modal argument against moral realism as an argument against Donald Davidson's position of 'anomalous monism' in the philosophy of mind (Blackburn 1985).' I shall assess this redeployment. In the first part of this paper, I shall lay out Blackburn's argument. In the second and longer part I shall examine Davidson's denial of psychophysical laws in the light of this argument.

Two criticisms of Davidson's argument for monism are presented. The first is that there is no obvious way for the anomalism of the mental to do any work in his argument. Certain implicit premises, on the other hand, entail monism independently of the anomalism of the mental, but they are question-begging. The second criticism is that even if Davidson's argument is sound, the variety of monism that emerges is extremely weak at best. I show that by constructing ontologically ``hybrid'' events that are consistent with the premises and assumptions of Davidson's argument, but entail ontological dualism.

I argue that, on plausible assumptions, anomalous entails monism epiphenomenalism of the mental. The plausible assumptions are (1) events are particulars; (2) causal relations are extensional; (3) mental properties are epiphrastic. A principle defender of anomalous monism, Donald Davidson, acknowledges that anomalous monism is committed to (1) and (2). I argue that it is committed to (3) as well. Given (1), (2), and (3), epiphenomenalism of the mental falls out immediately. Three attempts to salvage anomalous monism from epiphenomenalism of the mental are examined and rejected. I conclude with reflections on the status of non-reductive physicalism.

Despite the fact that Davidson's theory of the causal relata is crucial to his response to the problem of mental causation - that of anomalous monism - it is commonly overlooked within discussions of his position. Anomalous monism is accused of entailing property epiphenomenalism, but given Davidson's understanding of the causal relata, such accusations are wholly misguided. There are, I suggest, two different forms of property epiphenomenalism. The first understands the term 'property' in an ontological sense, the second in a linguistic sense. Anomalous monism cannot plausibly be accused of either. The first cannot legitimately be applied to anomalous monism as it is incompatible with Davidson's ontology. And accusations of predicate epiphenomenalism, although consistent with Davidson's ontology, are ungrounded regarding Davidson's anomalous monism. Philosophers of mind have mislocated the problem with Davidson's anomalous monism, which in fact lies with the implausible theory of the causal relata upon which it rests.

This is an overview of Davidson's theory of anomalous monism. Objections and replies are also detailed.