It would mean scrapping the law of conservation of momentum, which would have huge implications.
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I'm not real sure how that would invalidate space/time warping manipulation....
Theoretically we need large amounts of energy [matter, anti-matter anhialation maybe ] to warp and/or manipulate space/time/gravity, to give a perception of FTL
I didn't say it invalidated space/time warping manipulation, I said that if space/time can be manipulated in the way they are talking about then that would contravene the law of conservation of momentum, which would mean a complete re-write of the entire theory of physics as it now stands.