...[T]he proponents of competing paradigms practice their trades in different worlds. [...] Practicing in different worlds, the two groups of scientists see different things when they look from the same point in the same direction. Again, that is not to say that they can see anything they please. Both are looking at the world, and what they look at has not changed. But in some areas they see different things, and they see them in different relations one to the other.From "practicing in different worlds" to "both are looking at the world" in the space of two sentences! It gives a whole new meaning to the phrase "the destroyer of worlds". Jean Grey, eat your heart out!
-- Thomas Kuhn, The Structure of Scientific Revolutions, p. 150