I agree. It seems to me that "paradox
" is being used in place of "impossible, but don't think about it
". It is a clever story mechanism, one I often like, but one that doesn't seem to hold up. Most of the time this is fine. But Terminator asks us to believe that a set of circumstances can be set in motion by someone who doesn't exist because its always been that way. Clever story mechanism maybe. Clearly impossible certainly; "paradox" label slapped on or not.