Mathematics Is Purely Hypothetical: It Produces Nothing

It Has Never Been In My Power To Study Anything, Mathematics, Ethics, Metaphysics, Gravitation, Thermodynamics, Optics, Chemistry, Comparative Anatomy, Astronomy, Psychology, Phonetics, Economics, The History Of Science, Whist, Men And Women, Wine, Metrology, Except As A Study Of Semeiotic .

Do You Call It Doubting To Write Down On A Piece Of Paper That You Doubt? If So, Doubt Has Nothing To Do With Any Serious Business. But Do Not Make Believe; If Pedantry Has Not Eaten All The Reality Out Of You, Recognize, As You Must, That There Is Much That You Do Not Doubt, In The Least. Now That Which You Do Not At All Doubt, You Must And Do Regard As Infallible, Absolute Truth.

But The Extraordinary Insight Which Some Persons Are Able To Gain Of Others From Indications So Slight That It Is Difficult To Ascertain What They Are, Is Certainly Rendered More Comprehensible By The View Here Taken.

Consider What Effects That Might Conceivably Have Practical Bearings You Conceive The Objects Of Your Conception To Have. Then, Your Conception Of Those Effects Is The Whole Of Your Conception Of The Object.

There Is Not A Single Truth Of Science Upon Which We Ought To Bet More Than About A Million Of Millions To One.