[sparklite2]

...the wave function was only a prediction of the range of locations whereat our future measurement might find it.....(with probabilities for each location)..

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And the probability, in QM, that ‘coffee’ could exist outside the ‘cup,’ is greater than zero.

It’s called quantum tunneling and Luddites who declaim the absurdity of something so counter-intuitive are left to explain the successful application of quantum tunneling microscopes.

[faithhopecharity]

quantum tunneling certainly exists, as evidenced by the millions of tunnel diodes at work all around the world since our Japanese/Sony friends invented them in 1957

some people who object to this physics... do so quite understandably from the “lens” of their everyday experience .. where we do not observe such phenomena in our daily macro lives experience

but at the quantum level... we KNOW it is part of the actual physics of the universe

[Gideon7]

Quantum tunneling is real. It is a major issue in the design of modern microchips because at a sufficiently small feature size, electrons start jumping nonconductive barriers and mess up the state of the chip. Intel had to resort to using high-k materials to combat the problem.