Alternative origin of SkyNet?

"...There was an exam. A few years from now. Important Exam. The whole thing.
All this--

His gesture includes the car, the diploma, the fancy condo.

REESE
(continuing)
--everything...is gone. Just
gone. There were failures. Here. There. Nobody knew who started it.
(pause)
It was the machines.

SARAH
I don't understand...

REESE
Scholastic Marking Network computer. New.
Powerful. Hooked into everything.
Trusted to run it all. They say it got smart...a new order of intelligence. Then it saw all students as a threat, not just the ones on the other side. Decided our fate in a microsecond...
100% pass mark.
..."