A Single Observation That Is Inconsistent With

The Important Thing Is To Be Able To Understand Anyone Who Has Something Useful To Say. - There Is A General Moral Here. Be Very Careful And Very Clear About What You Say. But Do Not Be Dogmatic About Your Own Language. Be Prepared To Express Any Careful Thought In The Language Your Audience Will Understand. And Be Prepared To Learn From Someone Who Talks A Language With Which You Are Not Familiar.

From Any Vocabulary Of Ideas We Can Build Other Ideas By Formal Combinations Of Signs. But Not Any Set Of Ideas Will Be Instructive. One Must Have The Right Ideas.

A Single Observation That Is Inconsistent With Some Generalization Points To The Falsehood Of The Generalization, And Thereby 'points To Itself'.

Much Early Alchemy Seems To Have Been Adventure. You Heated And Mixed And Burnt And Pounded And To See What Would Happen. An Adventure Might Suggest An Hypothesis That Can Subsequently Be Tested, But Adventure Is Prior To Theory.

Until The Seventeenth Century There Was No Concept Of Evidence With Which To Pose The Problem Of Induction!