Online research in philosophy

This paper suggests that the arguments for compatibilism are invalid because they use incompatible definitions of causal determinism and free will, an illegitimate definition of free will, and a logical fallacy concerning free will and morality.

Peter van Inwagen contends that free will is a mystery. Here I present an argument in the spirit of van Inwagen's. According to the Assimilation Argument, libertarians cannot plausibly distinguish causally undetermined actions, the ones they take to be exercises of free will, from overtly randomized outcomes of the sort nobody would count as exercises of free will. I contend that the Assimilation Argument improves on related arguments in locating the crucial issues between van Inwagen and libertarians who hope to demystify free will, while avoiding objections these arguments have faced.

Peter van Inwagen has offered two versions of an influential argument that has come to be called ‘the Consequence Argument’. The Consequence Argument purports to demonstrate that determinism is incompatible with free will.1 It aims to show that, if we assume determinism, we are committed to the claim that, for all propositions p, no one has or ever had any choice about p. Unfortunately, the original Consequence Argument employed an inference rule (the β-rule) that was shown to be invalid. (McKay and Johnson 1996) In response, van Inwagen revised his argument. I shall argue that the conclusion of the revised Consequence Argument is wholly independent of the premiss of determinism, and hence that the revised Consequence Argument is useless in showing that determinism is incompatible with free will.

In this paper, I argue against Peter van Inwagen’s claim (in “Free Will Remains a Mystery”), that agent-causal views of free will could do nothing to solve the problem of free will (specifically, the problem of chanciness). After explaining van Inwagen’s argument, I argue that he does not consider all possible manifestations of the agent-causal position. More importantly, I claim that, in any case, van Inwagen appears to have mischaracterized the problem in some crucial ways. Once we are clear on the true nature of the problem of chanciness, agent-causal views do much to eradicate it.

Of liberty and necessity, by D. Hume.--The doctrine of necessity examined, by C. S. Peirce.--Determinism in history, by E. Nagel.--Some arguments for free will, by T. Reid.--Has the self free will? by C. A. Campbell.--Dialogue on free will, by L. de Valla.--Can the will be caused? by C. Ginet.--Free will, by G. E. Moore.--A modal muddle, by S. N. Thomas.--Determinism, indeterminism, and libertarianism, by C. D. Broad.--An empirical disproof of determinism? by K. Lehrer.--Free will, praise and blame, by J. J. C. Smart.--Bibliographical essay.

"This is an important book, and no one interested in issues which touch on the free will will want to ignore it."--Ethics. In this stimulating and thought-provoking book, the author defends the thesis that free will is incompatible with determinism. He disputes the view that determinism is necessary for moral responsbility. Finding no good reason for accepting determinism, but believing moral responsiblity to be indubitable, he concludes that determinism should be rejected.

Determinism seems incompatible with free will. However, even indeterminism seems incompatible with free will, since it seems to make free actions random. Popper contends that free agents are not bound by physical laws, even indeterministic ones, and that undetermined actions are not random if they are influenced by abstract entities. I argue that Popper could strengthen his account by drawing upon his theories of propensities and of limited rationality; but that even then his account would not fully explain why free actions are not random. I offer a solution to this problem which draws on Hornsby’s analysis of action. I then borrow an idea of Kant about self-consciousness to distinguish free agents from sub-human animals. I make a brief evaluation of Popper’s contribution.

In this paper I shall define a thesis I shall call 'determinism', and argue that it is incompatible with the thesis that we are able to act otherwise than we do (i.e., is incompatible with 'free will'). Other theses, some of them very different from what I shall call 'determinism', have at least an equal right to this name, and, therefore, I do not claim to show that every thesis that could be called 'determinism' without historical impropriety is incompatible with free will. I shall, however, assume without argument that what I call 'determinism' is legitimately so called. In Part I, I shall explain what I mean by 'determinism'. In Part II, I shall make some remarks about 'can'. In Part III, I shall argue that free will and determinism are incompatible. In Part IV, I shall examine some possible objections to the argument of Part III. I shall not attempt to establish the truth or falsity of determinism, or the existence or nonexistence of free will.

This paper has two parts. In the first part, I concede an error in an argument I have given for the incompatibility of free will and determinism. I go on to show how to modify my argument so as to avoid this error, and conclude that the thesis that free will and determinism are compatible continues to be—to say the least—implausible. But if free will is incompatible with determinism, we are faced with a mystery, for free will undeniably exists, and it also seems to be incompatible with indeterminism. In the second part of this paper, I will defend the conclusion that the concept of agent causation is of no use to the philosopher who wants to maintain that free will and indeterminism are compatible. I conclude that free will remains a mystery---that is, that free will undeniably exists and that there is a strong and unanswered prima facie case for its impossibility.

1. “All Theory is Against Free Will…” Powerful arguments have been leveled against the concepts of free will and moral responsibility since the Greeks and perhaps earlier. Some—the hard determinists—aim to show that free will is incompatible with determinism, and that determinism is true. Therefore there is no free will. Others, the “no-free-will-either-way-theorists,” agree that determinism is incompatible with free will, but add that indeterminism, especially the variety posited by quantum physicists, is also incompatible with free will. Therefore there is no free will. Finally, there are the a priori arguments against free will. These arguments conclude that it makes no difference what metaphysical commitments we hold: free will and ultimate moral responsibility are incoherent concepts. Why? Because in order to have free will and ultimate moral responsibility we would have to be causa sui, or ‘cause of oneself.’ And it is logically impossible to be self-caused in this way. Here, for example, is Nietzsche on the causa sui.