A thought for a Sunday

"There is a philosophy that says that if something is unobservable -- unobservable in principle -- it is not part of science. If there is no way to falsify or confirm a hypothesis, it belongs to the realm of metaphysical speculation, together with astrology and spiritualism. By that standard, most of the universe has no scientific reality -- it's just a figment of our imaginations."

Leonard Susskind (1940 - )

From - The Black Hole War: My Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics (2008)
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I really want to read this book. More Susskind coming soon for those who love physics and maths.