Take the simplest of all formulae, Two and two make four.

This--so far as it applies to nature--asserts that if you take two natural entities, and then again two other natural entities, the combined class contains four natural entities.

Such formulae which are true for any entities cannot result in the production of the concepts of atoms.

Then again there are formulae which assert that there are entities in nature with such and such special properties, say, for example, with the properties of the atoms of hydrogen.

Now if there are no such entities, I fail to see how any statements about them can apply to nature.