What he meant was mind reading/anticipating (pre-"crime"), even so-called thought crimes in the eyes of Big Brother.
"We have to rethink our notions of identity and secrecy. In the digital world, data is everywhere," he [David Petraeus when he was still CIA Director] said. "Data is created constantly, often unknowingly and without permission." "Every byte left behind reveals information about location, habits, and, by extrapolation, intent, and probable behavior."
For the MUSCULAR project, the GCHQ directs all intake into a 'buffer' that can hold three to five days of traffic before recycling storage space. From the buffer, custom-built NSA tools unpack and decode the special data formats that the two companies use inside their clouds. Then the data are sent through a series of filters to 'select' information the NSA wants and 'defeat' what it does not.
That's what I said long before Snowden revealed anything. They check it all and save everything (all the content) they want. Many people have good reason to believe that there is a backup of everything before anything is deleted such that MUSCULAR is simply a frontline filter and not the sole tool before any permanent, complete deletion from all governmental data-storage.