Definitions.... Are Never Really Needed, And Rarely

But It Is Certainly Not Possible To Insist On One Hand That The Formalism Is Complete And To Insist On The Other Hand That Its Application To 'the Actual' Actually Demands A Step Which Cannot Be Derived From It.

The Method Of Science Depends On Our Attempts To Describe The World With Simple Theories: Theories That Are Complex May Become Untestable, Even If They Happen To Be True. Science May Be Described As The Art Of Systematic Over-simplification-the Art Of Discerning What We May With Advantage Omit.

Our Aim Must Be To Make Our Successive Mistakes As Quickly As Possible. To Speed Up Evolution.

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.

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.