Ethics

The antiphilosopher could argue that, with regard to ethics, there is only practical, ordinary reasoning. Therefore, a priori it is wrong to superimpose overarching ideas of what is good for philosophical reasons. For example, it is wrong blanketly to assume that only happiness matters, as in utilitarianism. This is not to claim, however, that a utilitarian-like argument may not be valid in some particular case.

Continuum hypothesis

Consider the continuum hypothesis, stating that there is no set with size strictly between the size of the natural numbers and the size of the real numbers. One idea is that the set universe ought to be rich, with many sets, which leads to the continuum hypothesis being false.^[6][7] This richness argument, the antiphilosopher might argue, is purely philosophical, and groundless, and therefore should be dismissed; maintaining that the continuum hypothesis should be settled by mathematical arguments. In particular it could be the case that the question isn't mathematically meaningful or useful, that the hypothesis is neither true, nor false. It is then wrong to stipulate, a priori and for philosophical reasons, that the continuum hypothesis is true or false.^{[lower-roman 1]}

Wittgenstein's metaphilosophy

The views of Ludwig Wittgenstein, specifically his metaphilosophy, could be said to be antiphilosophy.^[1][3] In The New York Times, Paul Horwich points to Wittgenstein's rejection of philosophy as traditionally and currently practiced and his "insistence that it can't give us the kind of knowledge generally regarded as its raison d'être".^[3]

Horwich goes on to argue that:

Wittgenstein claims that there are no realms of phenomena whose study is the special business of a philosopher, and about which he or she should devise profound a priori theories and sophisticated supporting arguments. There are no startling discoveries to be made of facts, not open to the methods of science, yet accessible "from the armchair" through some blend of intuition, pure reason and conceptual analysis. Indeed the whole idea of a subject that could yield such results is based on confusion and wishful thinking.

Horwich concludes that, according to Wittgenstein, philosophy "must avoid theory-construction and instead be merely 'therapeutic,' confined to exposing the irrational assumptions on which theory-oriented investigations are based and the irrational conclusions to which they lead".

Moreover, these antiphilosophical views are central to Wittgenstein, Horwich argues.

Pyrrhonism

Pyrrhonism has been considered an antiphilosophy.^[8]