Philosophers Of Science Have Repeatedly Demonstrated That

The Transition Between Competing Paradigms Cannot Be Made A Step At A Time, Forced By Logic And Neutral Experience. Like The Gestalt Switch, It Must Occur All At Once (though Not Necessarily In An Instant) Or Not At All.

We See The World In Terms Of Our Theories.

Communication Across The Revolutionary Divide Is Inevitably Partial.

In Science Novelty Emerges Only With Difficulty, Manifested By Resistance, Against A Background Provided By Expectation.

Concerned To Reconstruct Past Ideas, Historians Must Approach The Generation That Held Them As The Anthropologist Approaches An Alien Culture. They Must, That Is, Be Prepared At The Start To Find That Natives Speak A Different Language And Map Experience Into Different Categories From Those They Themselves Bring From Home. And They Must Take As Their Object The Discovery Of Those Categories And The Assimilation Of The Corresponding Language.