What is the "natural abstraction hypothesis"?

The natural abstraction hypothesis says that

• Our physical world "abstracts" well: i.e., for most systems, the information about that system that is relevant “far away” from the system (in various senses) is much lower-dimensional than the system itself. These low-dimensional "summaries" are exactly the high-level abstract concepts typically used by humans to understand the world.

• These abstractions are “natural”: a wide variety of cognitive architectures will learn to use approximately the same high-level abstract objects/concepts to reason about the world.

Some critiques of this research program include: