Søren Klausen

The epistemology of abstract objects is a somewhat neglected topic in contemporary philosophy. I argue that a satisfactory account of our capacity for knowing abstract objects must consist in more than formal requirements. It must also comprise an investigation of the nature of the relevant processes of belief formation, notably the mental process known as intuition. A promising approach is what I call “constructionism” (not to be confused with antirealist forms of constructivism), the main ideas of which can be found in Kant, Peirce, Husserl and contemporary cognitive scientists like Laird-Johnson and Kosslyn. According to constructionism, we come to know complex abstract objects by carrying out processes of mental construction or performing mental experiments on the contents of lower-order mental acts. I discuss the strengths and limitations of the theory and suggest some possible further developments.

In spite of the booming interest in social epistemology, explicit analyses of group knowledge remain rare. Most existing accounts are based on theories of joint intentionality. I argue that this approach, though not without merit or useful applications, is inadequate both when it comes to accounting for actual group knowledge attributions and for purposes of meliorative social epistemology. As an alternative, I outline a liberal, de-intellectualized account, which allows for the complex distribution of epistemic states typical of most real-world collectives, and makes minimal requirements as to the psychological underpinnings of collective states of knowing and the formal features of groups. The account is inspired by theories of distributed and extended cognition. It is guided by the principle that we should use the same standard when dealing with social and individual epistemology. Careful attention to what is normally required—and, in particular, not required—for attributing knowledge to individuals lends support the more liberal view