What is the last thing mcwhorter says he would want to know if he had the ability to go into the future? what would he do with this knowledge?

McWhorter says that if he had the ability to go to the future, the last thing that he could ask for would be; To be shown texts written by 16-year old girls.

Explanation:

"please show me texts written by 16-year-old girls."

He says that he shall ask for a sheaf of the texts of 16-year girls, then use the information to determine the linguistic miracle that is happening in our blindness.

He would do this through sending the texts back to RAZ, after which they would determine  the place of development of this language that had developed since his times.

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