Abstract

In my paper, I spell out which types of libertarian theories can be refuted by Libet-style experiments and which cannot. I claim that, on the one hand, some forms of deliberative libertarianism and restrictive libertarianism cannot even in principle be denied on the basis of these experiments; and on the other hand, standard libertarianism, along with some versions of restrictive and deliberative libertarianism, can in principle be refuted by these experiments. However, any form of restrictive libertarianism can be refuted in the future only if researchers perform new and “untraditional” Libet-style experiments. This is because “traditional” Libet-style experiments investigate decisions in Buridan-type situations. But these decisions are irrelevant with regard to free will, according to the restrictivists. In the first section, I clarify some terminological issues in order to set the stage for a precise analysis. In the second, I attempt to show what the main reason is for thinking that Libet-style experiments seem to be problematic for libertarian theories. Although showing that actions are unconsciously initiated does not pose a real challenge for the elaborated philosophical theories of free will, Libet-style experiments may be problematic for most libertarian theories because, pace Roskies and Nahmias, libertarians have good reasons for saying that local determinism and free will are incompatible. In the third section, I argue that because some versions of deliberative libertarianism do not claim that decisions about actions are the center of freedom-relevant indeterminism, Libet-style experiments are unable to refute them after all. In the fourth, I attempt to show why standard centered libertarianism according to which there are no relevant metaphysical differences between different types of conscious decisions is in principle vulnerable to Libet-style experiments to a greater extent. Fifth, I point out the reasons why restrictivist centered libertarianism is less vulnerable to these experiments. Still, I argue that moderate-restrictivism can in principle be denied by Libet-style experiments if these experiments are modified in an important respect. However, proponents of hard-restrictivism should not worry about the possible results of these experiments because these theories restrict the set of free decisions to such a great extent that they cannot be subjected to a proper empirical test.