Which half? One day when I was a junior medical student, a very important Boston surgeon visited the school and delivered a great treatise on a large number of patients who had undergone successful operations for vascular reconstruction. At the end of the lecture, a young student at the back of the room timidly asked, "Do you have any controls?" Well the great surgeon drew himself up to his full height, hit the desk, and said, "Do you mean did I not operate on half of the patients?" The hall grew very quiet then. The voice at the back of the room hesitantly replied, "Yes, that's what I had in mind." Then the visitor's fist really came down as he thundered, "Of course not. That would have doomed half of them to their death!" God, it was quiet then, and one could scarcely hear the small voice ask, "Which half?" E.E. Peacock Jr., Seeing With Fresh Eyes science
The palette of nature "What nature does with its colors is invariably—the palette of nature is twice as complicated, at least twice as sophisticated, as anything any artist can ever come up with. On a couple levels. To start with, there are these amazing combinations of colors, filled with surprises and almost never wrong. I don't know how Nature ever conceived to put, say, those together. But, boy, are they right on the money!" Lawrence Wechler & Robert Irwin, Seeing Is Forgetting the Name of the Thing One Sees Colors in natureHues subdued naturecolor