Kai Nielsen is perhaps the most prolific of contemporary philosophers in Canada, as well as one of the most interesting. There are three salient aspects of his philosophy: his Marxism, his anti-foundationalism, and his particular brand of atheism. (The point of that last phrase will become clear in due course.) Among a large number of objections which I have to Nielsen's arguments and conclusions, one in particular stands out. I do not see how anti-fideism can consistently be combined with anti-foundationalism. The essence offideismis that one does not deem it necessary to rationally justify one's (typically religious) position, but one just “plumps for” it. But any justification of a (religious or other) position appears to involve appeal to foundations. Either the reasons in accordance with which a belief or set of beliefs is to be accepted can at least in principle be spelled out; or the belief or set of beliefs is arbitrary and unjustified. Nielsen needs to grasp the former horn of the dilemma to attack religious beliefs in the way he does; but to do so necessarily involves the foundationalism which he also attacks. A lot of the special quality of Nielsen, as a philosopher, comes out in the devices with which he covers over this intellectual crevasse.