Very interesting and thought provoking.
I would question the figures concerning the distribution of atoms in the discussion of homoeopathy. Atoms, so I am informed and without quoting the numbers, are very small. A cubic millimetre of a substance spread evenly throughout the oceans of the planet would result in there being more than one per litre. Which is intended as a pointer to the size of atoms, not as to the efficacy of homoeopathy.