The million-dollar question is what mechanisms and representations (potentially unlearned, potentially domain-specific) exist so that the learner, given the input, gradually comes to behave like an adult language user.

How come you weren't at the stand-up this morning?

Driven by the rural revitalization strategy, the number of poor people in China has been reduced year by year and people are living a richer life. With the joint efforts of all parties, the poverty alleviation work in Xinrong District has been fruitful.[…]Xinrong District is located in Datong City, Shanxi Province, with a total area of 1091.27 square kilometers and a total population of 118,000 people.

“You get a hold of yourself,” he said contemptuously. “Spare me your bile and worldweariness; my wife would not agree with you."