Our classical world is composed of mutually exclusive alternatives: Everything is either something or something else; it is a this or a that, though we may be unaware of these identities due to ignorance. A color is always either red or not red; two socks in a closed box are either a pair or not a pair whether we look inside or not. There is never a middle case in the classical world.
Quantum world, however, is quite different. Besides the two/many mutually exclusive alternatives everything in between too exists. A color is at once all colors until we pick one color by looking at it! A particle has no particular place until we force it to pick a place by measuring its place!
It turns out that mutually exclusive alternatives, our classical world, is only a small and often filtered portion of the underlying reality. Which reality we pick…
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