Miller and Brody argue that the notion of clinical equipoise is fundamentally misguided. The ethics of therapy and the ethics of research are two distinct enterprises that are governed by different norms. They state, “The doctrine of clinical equipoise is intended to act as a bridge between therapy and research, allegedly making it possible to conduct RCTs without sacrificing the therapeutic obligation of physicians to provide treatment according to a scientifically validated standard of care. This constitutes therapeutic misconception concerning the ethics of clinical trials, analogous to the tendency of patient volunteers to confuse treatment in the context of RCTs with routine medical care.”  Equipoise, they argue, only makes sense as a normative assumption for clinical trials if one assumes that researchers have therapeutic obligations to their research participants. Further criticisms of clinical equipoise have been leveled by Robert Veatch  and by Peter Ubel and Robert Silbergleit. 
nature , "essential qualities, innate disposition," also "creative power in the material world," from . nature, from L. natura "course of things, natural character, the universe," lit. "birth," from natus "born," pp. of nasci "to be born," from PIE *gene- "to give birth, beget" (see genus). Original sense is in human nature. Meaning "inherent, dominating power or impulse" of a person or thing is from . Contrasted with art since 1704. Nature and nurture have been contrasted since should be avoided in such vague expressions as 'a lover of nature,' 'poems about nature.' ... Unless more specific statements follow, the reader cannot tell whether the poems have to do with natural scenery, rural life, the sunset, the untouched wilderness, or the habits of squirrels." [Strunk & White, "The Elements of Style," 3rd ed., 1979]Naturist "participant in the movement for communal nudity" is from 1929.