Intelligence Is The Ability To Adapt To

One Is Always A Long Way From Solving A Problem Until One Actually Has The Answer.

A Model Is A Good Model If First It Interprets A Wide Range Of Observations In Terms Of A Simple And Elegant Model, And Second If The Model Makes Definite Predictions That Can Be Tested, And Possibly Falsified, By Observation.

Maybe I'm Being A Bit Harsh On Philosophers, But They Have Not Been Very Kind To Me... I Have Been Variously Called Nominalist, An Instrumentalist, A Positivist, A Realist, And Several Other Ists. The Technique Seems Refutation By Denigration: If You Can Attach A Label To My Approach, You Don't Have To Say What Is Wrong With It... I Am Sure That Einstein, Heisenberg And Dirac Didn't Worry About Whether They Were Realists Or Instrumentalists.

One Might Think This Means That Imaginary Numbers Are Just A Mathematical Game Having Nothing To Do With The Real World. From The Viewpoint Of Positivist Philosophy, However, One Cannot Determine What Is Real. All One Can Do Is Find Which Mathematical Models Describe The Universe We Live In. It Turns Out That A Mathematical Model Involving Imaginary Time Predicts Not Only Effects We Have Already Observed But Also Effects We Have Not Been Able To Measure Yet Nevertheless Believe In For Other Reasons. So What Is Real And What Is Imaginary? Is The Distinction Just In Our Minds?

Time Travel Was Once Considered Scientific Heresy, And I Used To Avoid Talking About It For Fear Of Being Labelled A 'crank.'