[madfly]

Try these, I think "None" is plural.

None of these charges is true
One of these charges is true

Some of these charges is true

One was able to vote

None were able to vote

[ladylib]

That's right. I was told that you isolated the prepositional phrase and didn't consider it. "None were able to vote" doesn't include a prepositional phrase.

[ArGee]

I believe LadyLib is correct. None is singular. Therefore, None of these charges is true.

Substitute 'Not one' for 'None'.

Shalom.