"All physical systems can be thought of as registering and processing information, and how one wishes to define computation will determine your view of what computation consists of."
"Unlike mathematical theorems, scientific results can't be proved. They can only be tested again and again, until only a fool would not believe them. I cannot prove that electrons exist..........if you don't believe in them I have a high voltage cattle prod I'm willing to apply as an argument on their behalf. Electrons speak for themselves."
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Source: Seth Lloyd on Quantum Computing by Scott Dewing, blog.insidethebox.org, September 23, 2011.
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