Final answer:
Breakdowns in explaining subjective experiences or consciousness through physical processes challenge the PC view, which suggests mental states are purely physical.
Step-by-step explanation:
When discussing the PC view, it is often a reference to the idea of physicalism (or physical materialism) in the philosophy of mind, where it is believed that mental states are entirely physical states.
The breakdown in the machine that presents a problem for the PC view is typically a reference to any situation where mental processes cannot be completely explained by physical processes alone.
For example, issues like qualia, the subjective, qualitative aspects of conscious experience, present a challenge to the PC view because they are difficult to explain solely through physical processes. Additionally, complexities in understanding consciousness and the 'hard problem of consciousness' illustrate limitations in the PC view.