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To Turn Karl [popper]'s View On Its Head, It Is Precisely The Abandonment Of Critical Discourse That Marks The Transition Of Science. Once A Field Has Made The Transition, Critical Discourse Recurs Only At Moments Of Crisis When The Bases Of The Field Are Again In Jeopardy. Only When They Must Choose Between Competing Theories Do Scientists Behave Like Philosophers.

We See The World In Terms Of Our Theories.

Groups Do Not Have Experiences Except Insofar As All Their Members Do. And There Are No Experiences... That All The Members Of A Scientific Community Must Share In The Course Of A [scientific] Revolution. Revolutions Should Be Described Not In Terms Of Group Experience But In Terms Of The Varied Experiences Of Individual Group Members. Indeed, That Variety Itself Turns Out To Play An Essential Role In The Evolution Of Scientific Knowledge.

It Is, I Think, Particularly In Periods Of Acknowledged Crisis That Scientists Have Turned To Philosophical Analysis As A Device For Unlocking The Riddles Of Their Field. Scientists Have Not Generally Needed Or Wanted To Be Philosophers.

What Chemists Took From Dalton Was Not New Experimental Laws But A New Way Of Practicing Chemistry (he Himself Called It The 'new System Of Chemical Philosophy'), And This Proved So Rapidly Fruitful That Only A Few Of The Older Chemists In France And Britain Were Able To Resist It.