Philosophy
The Causal Theory of Perception and Its Challenges
Quick fact
Philosopher Grice's famous example of a reflective mirror shows that not every causal connection to an object counts as perceiving it, creating the 'deviant causal chain' challenge.
Why this is interesting
You look at a red apple on the table and 'see' it. But what makes that experience a genuine seeing, rather than just an internal image? The simple answer—'the apple caused your experience'—opens a philosophical can of worms.