Abstract
Owing to their peculiar nature of ‘quasi-objects’ or ‘negative objects’ (absences with a shape), shadows and holes are a promising source of insight about the representation of physical objects in cognition. In philosophy, informal conceptual analysis has uncovered interesting common features. (i) Both holes and cast shadows (henceforth simply ‘shadows’) are dependent features; they cannot exist without objects hosting or casting them. Both shadows and holes are somewhere between being regions of space and fully-fledged material objects: they are (ii) similar enough to bounded regions of space in that they have a location, a shape, a size, and are as immaterial as space is, but are (iii) more object-like as they can persist over time and move [1].
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