Abstract

The aim of this chapter is to take a closer look at medieval discussions concerning the phenomenon of ‘perceiving as,’ and the psychological mechanisms that lie behind it. In contemporary philosophical literature this notion is usually used to refer to conceptual aspects of perception. For instance, when I perceive a black birdlike shape as a crow, I may be said to perceive the particular sensible thing x as an instance of a universal crowness φ, that is, as belonging to a natural kind and falling under the concept of ‘crow’. In this sense, perceiving x as φ requires mastering the concept φ. However, I use the term ‘perceiving as’ in a wider sense and concentrate on various kinds of non-conceptual sensory processes, which can be understood as forms of ‘perceiving as’. Even though conceptual perception requires intellectual powers, medieval discussions on cognitive psychology can be understood properly only by taking into account the complex forms of perception that fall short of being truly intellectual, but are nevertheless over and above the simple sensation of sensible qualities of external things. The borderline between simple sensation and conceptual perception is unclear, and quite a lot is going on in the grey area between the two. Instead of presupposing any modern notion of ‘perceiving as’ and applying it to medieval discussions, my purpose is the opposite: to look at medieval discussions and see if they can be used to broaden modern discussions by including also non-conceptual varieties of perception. I shall begin the analysis in section two by specifying various types of cogni- tive processes that were discussed by medieval authors and can be considered as forms of ‘perceiving as’. The bulk of the historical work will be done in sec- tion three, where I focus on medieval discussions on three interrelated cogni- tive functions – perceiving different sensible qualities as a synthetic whole, incidental perception of one sensible quality through another, and the possi- bility of perceiving substances and recognising individuals. The reader should bear in mind that I shall use ideas from several medieval authors without pay- ing much attention to the differences between their theories of perception. Although occasionally radical, these differences are not highly relevant in the context of the present chapter. In section four, I propose two theoretical mod- els that can be used for analysing medieval views concerning these psychologi- cal phenomena. Finally, I conclude the chapter by making some remarks on the potential impacts of reading medieval views in relation to the concept of ‘perceiving as’.