Part 3/10:
However, this physicalist approach grapples with what is known as "the hard problem" of consciousness: how does subjective experience arise from neural activity? For example, how can a specific pattern of neural firing be definitively linked to the experience of tasting chocolate, rather than the scent of an orange? Despite the brilliance of those pursuing this inquiry, the speaker believes that physicalists face a fundamental flaw in their assumptions regarding the existence of physical systems when they are not perceived.