It Must Be Possible For

In Point Of Fact, No Conclusive Disproof Of A Theory Can Ever Be Produced; For It Is Always Possible To Say That The Experimental Results Are Not Reliable Or That The Discrepancies Which Are Asserted To Exist Between The Experimental Results And The Theory Are Only Apparent And That They Will Disappear With The Advance Of Our Understanding. If You Insist On Strict Proof (or Strict Disproof) In The Empirical Sciences, You Will Never Benefit From Experience, And Never Learn From It How Wrong You Are.

There Is An Almost Universal Tendency, Perhaps An Inborn Tendency, To Suspect The Good Faith Of A Man Who Holds Opinions That Differ From Our Own Opinions. It Obviously Endangers The Freedom And The Objectivity Of Our Discussion If We Attack A Person Instead Of Attacking An Opinion Or, More Precisely, A Theory.

With Regards To Political Enemies Plato Had A Kill-and-banish Principle. ... In Interpreting It , Modern-day Platonists Are Clearly Disturbed By It, Even As They Make Elaborate Attempts To Defend Plato.

We Must Plan For Freedom, And Not Only For Security, If For No Other Reason Than Only Freedom Can Make Security More Secure.

The Growth Of Our Knowledge Is The Result Of A Process Closely Resembling What Darwin Called 'natural Selection'; That Is, The Natural Selection Of Hypotheses: Our Knowledge Consists, At Every Moment, Of Those Hypotheses Which Have Shown Their (comparative) Fitness By Surviving So Far In Their Struggle For Existence, A Competitive Struggle Which Eliminates Those Hypotheses Which Are Unfit.