Rush snorts. Psychic. Generalizations built on a slightly-more-acceptable hypothesis of abnormalized humans rather than an entirely different species. Obviously hailing from a lower-technology world. Acceptance of the theorem of aliens would be asking far too much from someone of that mental caliber, so Rush addresses the points that he believes will make the most sense to whatever kind of brain this man carries with him.

"If I were psychic," he replies, scathing vitriolic capabilities fully restored, "do you honestly think you could have shot at me and I wouldn't have known?"

He's assuming this man speaks the language of bullets. It certainly seems to be the case thus far. A soldier. A military man. Obedience and weaponry and no sense of imagination. Hence - no aliens. And no expectation for basic comprehension for anything Rush has just said, though at least the threat of being shot seems to have been significantly reduced.