Sven Bernecker

Hilary Putnam has famously argued that “we are brains in a vat” is necessarily false. The argument assumes content externalism (also known as semantic externalism and anti-individualism), that is, the view that the individuation conditions of mental content depend, in part, on external or relational properties of the subject’s environment. Recently content externalism has given rise to the hypothesis of the extended mind, whereby mental states are not only externally individuated but also externally located states. This chapter argues that when content externalism is combined with the extended mind hypothesis it is robbed of its anti-skeptical power. Given the extended mind hypothesis, the supercomputer and the envatted brain can be regarded as aspects of the extended mind of the evil scientist. On this view, the thought contents of the coupled brain–computer–scientist system do not differ from those of a normal human. But without a difference in thought contents Putnam’s anti-skeptical argument crumbles.

It has long been known that memory need not be a literal reproduction of the past but may be a constructive process. To say that memory is a constructive process is to say that the encoded content may differ from the retrieved content. At the same time, memory is bound by the authenticity constraint which states that the memory content must be true to the subject's original perception of reality. This paper addresses the question of how the constructive nature of visual memory can be reconciled with the authenticity constraint. In what respect and to what extent may the content of a visual memory differ from the original perceptual state while still adequately reflecting the subject's original perception?

This paper explains and defends Reinhold’s epistemology of disagreement. The concept of agreement is of central importance for Reinhold’s philosophy. He attempts to settle the most basic disputes among post-Kantian philosophers by offering intermediate positions that reconcile the seemingly incompatible views. Moreover, Reinhold argues for epistemic objectivism, that is, the thesis that a group of philosophers sharing the same information and respecting each other’s opinion may not reasonably disagree. If the members of such a group search for truth then they must converge toward consensus. Disagreement is irrational.

This paper criticizes the widespread view whereby a second-order judgment of the form ‘I believe that p ’ qualifies as self-knowledge only if the embedded content, p , is of the same type as the content of the intentional state reflected upon and the self-ascribed attitude, belief, is of the same type as the attitude the subject takes towards p . Rather than requiring identity of contents across levels of cognition self-knowledge requires only that the embedded content of the second-order thought be an entailment of the content of the intentional state reflected upon. And rather than demanding identity of attitudes across levels of cognition self-knowledge demands only that the attitude of the intentional state reflected upon and the attitude the subject self-attributes share certain features such as direction of fit and polarity.