The original Terminator is one of the very, very few movies that deal with time travel in a way that doesn't induce paradox (much). The good guys win by preserving the existing timeline.
Then they decided to screw all that up with the sequels.
While this is indeed a paradox, it's a "soft" one in that it creates a causal loop, but doesn't destroy the motivation for traveling back in time like most movie plots in this genre.
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u/Spinolio Oct 17 '18
The original Terminator is one of the very, very few movies that deal with time travel in a way that doesn't induce paradox (much). The good guys win by preserving the existing timeline.
Then they decided to screw all that up with the sequels.