The Decision To Reject One Paradigm Is

Later Scientific Theories Are Better Than Earlier Ones For Solving Puzzles In The Often Quite Different Environments To Which They Are Applied. That Is Not A Relativist's Position, And It Displays The Sense In Which I Am A Convinced Believer In Scientific Progress.

What A Man Sees Depends Both Upon What He Looks At And Also Upon What His Previous Visual-conceptual Experience Has Taught Him To See.

Literally As Well As Metaphorically, The Man Accustomed To Inverting Lenses Has Undergone A Revolutionary Transformation Of Vision.

As In Political Revolutions, So In Paradigm Choice-there Is No Standard Higher Than The Assent Of The Relevant Community... This Issue Of Paradigm Choice Can Never Be Unequivocally Settled By Logic And Experiment Alone.

No Part Of The Aim Of Normal Science Is To Call Forth New Sorts Of Phenomena; Indeed Those That Will Not Fit The Box Are Often Not Seen At All. Nor Do Scientists Normally Aim To Invent New Theories, And They Are Often Intolerant Of Those Invented By Others.