I'm sure there is room for reasonable difference in opinion about the magnitude of the effect, but its existence is common currency among people who are actually working in the area! (julesandjames.blogspot.ru)
So while I will always respect reasonable differences of opinion, I will not and need not ever respect sloppy jurisprudence. (lawyerist.com)
«The debate about the value of mammography screening is not likely to fade away, and there are real, reasonable differences of opinion about various aspects of screening,» Smith continued. (sciencedaily.com)