The original question was: …true randomness on a quantum level
has experimentally been shown to exist. My question is, does
this quantum randomness ever/often/always bubble up to our
readily observable world of Newtonian physics to create truly
random everyday events? Physicist: Hard to say. Quick aside: The
difference between quantum randomness, which is absolute, and
classical randomness, which basically means “very hard to
predict”, is covered a bit in this older post. In a nutshell, up
until the science of quantum mechanics came along it was assumed
that if you (somehow) knew everything about an object at one
moment, you would be able to perfectly predict how it behaved
the next. However, it turns out that even if you know absolutely
everything about a radioactive atom, for example, it’s still
impossible to accurately predict when it will decay. This is
called “fundamental”, “irreducible”, or “quantum” randomness.
Back to the point: Large scale effects can be thought of in
terms of lots of small-scale eff