Can something come from nothing

[Neo-Scholastic]

The fact is that some ontological positions are logically incoherent, like materialism, and others are not.

In what way is materialism incoherent, ontologically?

My comment was more of a throw away line leading to a larger point about Robvalue's tacit ontology. Your question is simple. But since materialism is a term of art, I would place myself in peril of creating a host of straw men if I failed to make all manner of qualifications and distinctions between physical reduction, naturalism, mechanism, etc. I am sure you already have some notions of my general objections to materialistic theories. You and I have discussed it many times.

By the way, I'm a mathematician...

...who apparently believes that the sum of a string of zeros is greater than zero.