Thomas Kuhn

"Incommensurability is the essence of scientific revolutions."

"We inherit paradigms as surely as we inherit our native language."

"Scientific knowledge accumulates only within an accepted paradigm."

"The puzzle-solver knows in advance what the solution looks like."

"Paradigm shifts create new ways of seeing the world."

"A crisis in science is a crisis in the paradigm itself."

"The young scientist must learn the tricks of the trade."

"Revolutionary change is discontinuous and rapid."

"Scientific truth is not discovered but constructed within a paradigm."

"The history of science is the history of paradigm shifts."

"Anomalies teach us more than confirmed instances."

"Science cannot resolve all disputes by rational argument alone."

"The scientist's loyalty to his paradigm enables normal science."

"We see what our paradigm prepares us to see."

"Progress requires both continuity and revolution."

"The paradigm determines what counts as a valid scientific problem."

"Revolutionary scientists must learn a new way of seeing."

"Kuhn's insight was that science is not a steady accumulation of truth."

"The gestalt switch represents genuine discovery."

"Science cannot be reduced to a set of logical rules."

"Communities are what make science possible."

"New paradigms often appear to be irrational until they are understood."

"The transition period is the most creative moment in science."

"Scientists resist paradigm shifts with intellectual honesty."

"What counts as progress depends on one's paradigm."

"The concept of proof is relative to one's paradigm."

"Paradigms guide perception as well as interpretation."

"Scientific revolutions overturn fundamental assumptions."

"The old guard must make way for the new in science."

"Paradigm choice is a matter of community consensus."