I've Noticed That Even People Who Believe

A Theory Is A Good Theory If It Satisfies Two Requirements: It Must Accurately Describe A Large Class Of Observations On The Basis Of A Model That Contains Only A Few Arbitrary Elements, And It Must Make Definite Predictions About The Results Of Future Observations.

Time Travel Used To Be Thought Of As Just Science Fiction, But Einstein's General Theory Of Relativity Allows For The Possibility That We Could Warp Space-time So Much That You Could Go Off In A Rocket And Return Before You Set Out.

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?

Ever Since The Dawn Of Civilization, People Have Not Been Content To See Events As Unconnected And Inexplicable. They Have Craved An Understanding Of The Underlying Order In The World. Today We Still Yearn To Know Why We Are Here And Where We Came From. Humanity's Deepest Desire For Knowledge Is Justification Enough For Our Continuing Quest. And Our Goal Is Nothing Less Than A Complete Description Of The Universe We Live In.

I Have Noticed Even People Who Claim Everything Is Predestined, And That We Can Do Nothing To Change It, Look Before They Cross The Road.