Abstract

According to Alvin Plantinga, the cornerstone of epistemology is the proper functioning of our cognitive faculties in accordance with the design plan. In this paper I will explore two aspects of the design plan that are of central relevance to the acquisition of warranted true beliefs. In the first place, perceptual beliefs were supposed to be taken in the basic way and should therefore constitute highly warranted true beliefs. Scale errors in young children pose serious problems for this argument, while they show that part of the visual system may be misguided by perceptual beliefs, as a normal part of the development of the human design plan. Secondly, the ascription of mental states to other persons does not depend on deductive or inductive inference from behaviour. However, the discovery of so-called ‘mirror-neurons' suggests that motor simulation of observed behaviour plays a crucial role in understanding the intentions of others. I conclude by arguing for a refinement of the notion of ‘design plan', guided by recent approaches in cognitive science that should make Plantinga's externalist account at least falsifiable. South African Journal of Philosophy Vol. 26 (3) 2007: pp. 319-328