It Is Not That We Propose A

One May Rationally Stick To A Degenerating Research Programme Until It Is Overtaken By A Rival And Even After. What One Must Not Do Is To Deny Its Poor Public Record... It Is Perfectly Rational To Play A Risky Game: What Is Irrational Is To Deceive Oneself About The Risk.

It Would Be Wrong To Assume That One Must Stay With A Research Programme Until It Has Exhausted All Its Heuristic Power, That One Must Not Introduce A Rival Programme Before Everybody Agrees That The Point Of Degeneration Has Probably Been Reached.

Research Programmes, Besides Their Negative Heuristic, Are Also Characterized By Their Positive Heuristic.

Belief May Be A Regrettably Unavoidable Biological Weakness To Be Kept Under The Control Of Criticism: But Commitment Is For Popper An Outright Crime.

Man's Respect For Knowledge Is One Of His Most Peculiar Characteristics. Knowledge In Latin Is Scientia, And Science Came To Be The Name Of The Most Respectable Kind Of Knowledge.