No Particular Theory May Ever

Evolution Is Not A Fact. Evolution Doesn't Even Qualify As A Theory Or As A Hypothesis. It Is A Metaphysical Research Program, And It Is Not Really Testable Science.

The Scientific Tradition Is Distinguished From The Pre-scientific Tradition By Having Two Layers. Like The Latter, It Passes On Its Theories; But It Also Passes On A Critical Attitude Towards Them.

To Give A Causal Explanation Of An Event Means To Deduce A Statement Which Describes It, Using As Premises Of The Deduction One Or More Universal Laws, Together With Certain Singular Statements, The Initial Conditions ... We Have Thus Two Different Kinds Of Statement, Both Of Which Are Necessary Ingredients Of A Complete Causal Explanation.

A Theory Which Is Not Refutable By Any Conceivable Event Is Non-scientific. Irrefutability Is Not A Virtue Of A Theory (as People Often Think) But A Vice.

I Have Learned More From Hayek Than From Any Other Living Thinker, Except Perhaps Alfred Tarski - But Not Even Excepting Russell.