The gap between an LLM’s word skills and its real-world physical understanding.
It is like a kid who memorized every bike manual. Put them on a bike, and the curb becomes a surprise.
An LLM can explain how things should move. It may still fail at robot tasks or judging space.
LLM
This gap is a common weakness in an LLM’s physical common sense.
World model
A world model can help predict changes in the environment.
Embodied AI
Real-world interaction makes this gap easy to spot.