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Blink is also a mage spell in World of Warcraft since 2004. "Teleports you forward 20 yds or until reaching an obstacle, and frees you from all stuns and bonds." (wowhead.com/spell=1953/blink)
That is what Kyle says. Which is not necessarily the truth or maybe not even what he believes. His purpose is to convince Sarah to cooperate with his plans, not a scientific lecture on Terminatorology.
The separation of the two Suns may appear as "two to four" diameters, but we only see the 2D projection of the Suns. In the perpendicular direction, the separation could be much larger.
@Robbie: I happen to be reading the Hobbit to my 9-year old this month and at one point he asked me who the "I" in the book was. I told him at first that the "I" was the author of the book. But then I reconsidered and said the "I" was myself, because it is the one who is reading the book to him.
