Originally Posted By: K
depends on QM and would have been impossible to consider 100 years ago


Same can be said for wave/particle duality etc. etc. What's your point here?

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Have a wave, say EM. Reduce its frequency all the way to zero. What happens to its wavelength or period?


Come back Zeno...all is forgiven. Have you un-quantised your EM radiation for the sake of argument?

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It should all be invalid because there's no physical infinity, just as there's no physical -3.


If there is no physical infinity, then presumably, when we talk of an infinite universe (cosmos, or whatever), all we are saying is that it is unbounded. So why not say that?

There never was nothing.