Claude just analyzed the emotional content of a piece of music for me -- quite accurately -- by just looking at an uploaded PDF of the score. How does that work? "It's a nonlinear system" or "it's a bunch of matrix multiplication" is in no useful way an explanation. That's way down at the bottom of an explanatory abstraction hierarchy that we have only begun to make tools to begin to explore. It's like asking how humans work and getting the answer "it's just undergraduate chemistry!"

The study of LLMs is much closer to biology than engineering.