What principle does Reid argue against regarding the relationship between ideas and reality?

The principle that Reid argues against is that ideas correspond to reality directly. Reid challenges this notion by emphasizing that our understanding of reality is mediated through various forms of perception and cognition. He advocates for a more complex relationship between ideas and reality, suggesting that while our ideas can reflect aspects of reality, they are not mere replicas or direct correspondences. Instead, Reid posits that ideas are shaped by our experiences and interactions with the world, which introduces a layer of interpretation and processing that complicates the notion of direct correspondence. This perspective aligns with his commitment to empirical realism, where the mind plays an active role in constructing our understanding of the external world.

Understanding Reid's position highlights the philosophical debates surrounding perception, cognition, and the nature of reality, and illustrates the inherent complexity in the way we conceptualize our experiences and the world around us.