A lot of the words he uses in that tweet aren't well defined. e.g. memorization, dataset (does he mean the literal words/tokens or any token that is close in space after embedding?), pattern, category, program. The tweet is practically meaningless. I'm not criticizing him because his blog post is nuanced and he clearly understands what he's talking about, but that tweet almost certainly means something quite specific to him and he's communicating quite poorly.

As you mention, there is a sophisticated representation of the tokens. It's so sophisticated that one may reasonably stop calling them tokens (or, even data) and start calling them "concepts". Now, if someone (or something) has memorized how all the concepts go together... that's pretty darn intelligent.