Natural Selection Is Not Evolution.

If ... We Choose A Group Of Social Phenomena With No Antecedent Knowledge Of The Causation Or Absence Of Causation Among Them, Then The Calculation Of Correlation Coefficients, Total Or Partial, Will Not Advance Us A Step Toward Evaluating The Importance Of The Causes At Work.

No Practical Biologist Interested In Sexual Reproduction Would Be Led To Work Out The Detailed Consequences Experienced By Organisms Having Three Or More Sexes; Yet What Else Should He Do If He Wishes To Understand Why The Sexes Are, In Fact, Always Two?

Fairly Large Print Is A Real Antidote To Stiff Reading.

The Best Time To Plan An Experiment Is After You've Done It.

The Best Causes Tend To Attract To Their Support The Worst Arguments, Which Seems To Be Equally True In The Intellectual And In The Moral Sense.