It Is Wrong To Ask Who Will

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.

The Game Of Science Is, In Principle, Without End. He Who Decides One Day That Scientific Statements Do Not Call For Any Further Test, And That They Can Be Regarded As Finally Verified, Retires From The Game.

A Rationalist, As I Use The Word, Is A Man Who Attempts To Reach Decisions By Argument And Perhaps, In Certain Cases, By Compromise, Rather Than By Violence. He Is A Man Who Would Rather Be Unsuccessful In Convincing Another Man By Argument Than Successful In Crushing Him By Force, By Intimidation And Threats, Or Even By Persuasive Propaganda.

We Should Therefore Claim, In The Name Of Tolerance, The Right Not To Tolerate The Intolerant.

The Only Way To Test A Hypothesis Is To Look For All The Information That Disagrees With It.