This is the specific model for the current task. (e.g., "In this Super Mario level, there is a hidden block right here.") It's built on-the-fly.
This provides the priors for the instance model. (e.g., "My intuitive model of physics says characters can't float and must jump on platforms.")
This is your model of how to learn. It lets you transfer abstract principles (like "physics") to new games, allowing you to learn faster. This is cross-domain generalization.