It's an open question, but I certainly suspect the reason humans are able to do this is we can synthesize knowledge from other sources and not have to rely sole

It's an open question, but I certainly suspect the reason humans are able to do this is we can synthesize knowledge from other sources and not have to rely solely upon learning from text. We've been to movie theaters and experienced buying candy there, which adds a great deal to our understanding of sentence containing the associated words without needing to read a hundred million sentences about movies and candy and rely only upon statistical patterns in the text to understand it.