Alva Stråge

Among physicalists about the mental, it is widely accepted that two mental states of the same type (e.g., two beliefs) can be realized by physical states of different types. Call this “mental type multiple realizability.” Some have defended a more radical multiple realizability view, however. The idea is that the very same mental state (or mental event) token, which is realized—in the actual world—by a certain physical realizer, could have been realized by another physical realizer. This is what we call “token-level multiple realizability.” If correct, this would challenge not only type-type identity, but also token-token identity, between mental and physical states. In this paper we present a problem for this view, in favor of token-token identity.

It is a common idea, and an element in many legal systems, that people can deserve punishment when they commit criminal (or immoral) actions. A standard philosophical objection to this retributivist idea about punishment is that if human choices and actions are determined by previous events and the laws of nature, then we are not free in the sense required to be morally responsible for our actions, and therefore cannot deserve blame or punishment. It has recently been suggested that this argument can be backed up by neuroscience, since neuroscientific explanations of human behavior leave no room for non-determined free actions. In this thesis, an argument of this sort is discussed. According to this argument, that I call “the Revision Argument”, we should revise the legal system so that any retributivist justification of punishment is removed. I examine some objections to the Revision Argument according to which compatibilism about free will and responsibility is a morally acceptable basis of retributive punishment. I argue that these objections have difficulties in providing a plausible account of the relevant difference between people who deserve punishment for their actions and people who do not. Therefore, I argue that they fail to refute the conclusion of the Revision Argument.

Many philosophers take mental causation to be required for free will. But it has also been argued that the most popular view of the nature of mental states, i.e. non-reductive physicalism, excludes the existence of mental causation, due to what is known as the ‘exclusion argument’. In this paper, I discuss the difference-making account of mental causation proposed by [List, C., and Menzies, P. 2017. “My Brain Made Me Do It: The Exclusion Argument Against Free Will, and What’s Wrong with It.” In H. Beebee, C. Hitchcock, & H. Price (eds.), Making a Difference: Essays on the Philosophy of Causation. Oxford Scholarship Online: Oxford University Press], who argue that their account not only solves the problem of causal exclusion but also saves free will. More precisely, they argue that it rebuts what they call ‘the Neurosceptical Argument’, the argument that if actions are caused by neural states and processes unavailable to us, there is no free will. I argue that their argument fails for two independent reasons. The first reason is that they fail to show that difference-makers are independent causes. The second reason is that physical realizers of mental states can be individuated in a way that makes both mental states and their realizers difference-makers.