Wishful thinking, if not base motives, overpowers most common sense. This seems to be about "reaction-less drives" - I remember reading about how hard-headed S

Wishful thinking, if not base motives, overpowers most common sense. This seems to be about "reaction-less drives" - I remember reading about how hard-headed SF editor J.W.Campbell had a weak spot for such devices, several decades ago. He entertained a few demos, if memory serves. Didn't pan out then, probably won't now.