We Never Know What We Are Talking

No Matter How Many Instances Of White Swans We May Have Observed, This Does Not Justify The Conclusion That All Swans Are White.

Astrologers Were Greatly Impressed, And Misled, By What They Believed To Be Confirming Evidence-so Much So That They Were Quite Unimpressed By Any Unfavorable Evidence. Moreover, By Making Their Interpretations And Prophecies Sufficiently Vague They Were Able To Explain Away Anything That Might Have Been A Refutation Of The Theory Had The Theory And The Prophecies Been More Precise. In Order To Escape Falsification They Destroyed The Testability Of Their Theory. It Is A Typical Soothsayer's Trick To Predict Things So Vaguely That The Predictions Can Hardly Fail: That They Become Irrefutable.

Good Tests Kill Flawed Theories; We Remain Alive To Guess Again.

I Am Opposed To Looking Upon Logic As A Kind Of Game. ... One Might Think That It Is A Matter Of Choice Or Convention Which Logic One Adopts. I Disagree With This View.

Philosophy Is A Necessary Activity Because We, All Of Us, Take A Great Number Of Things For Granted, And Many Of These Assumptions Are Of A Philosophical Character; We Act On Them In Private Life, In Politics, In Our Work, And In Every Other Sphere Of Our Lives -- But While Some Of These Assumptions Are No Doubt True, It Is Likely, That More Are False And Some Are Harmful. So The Critical Examination Of Our Presuppositions -- Which Is A Philosophical Activity -- Is Morally As Well As Intellectually Important.