“some” - singular vs plural

Question

Disclaimer: possible duplicate of this question.

Considering what I read there, I would refrain from asking this, but a (english professor, british native speaker) colleague of mine's husband (off-topic but I'm a portuguese citizen) stated against it, so I would thank some further enlightenment.

He advocates "some" should be solely used referring to plural forms and thus whereas

"some non-existent towns"

is perfectly correct

"some non-existent town"

should be replaced by

"a non-existent town".

Answer 1

Some indeed can be use in this general sense.

If you visit OneLook, you'll see several meanings of the word some. One of them reads:

used for referring to a person or thing without knowing or without saying exactly which one

So, saying:

We'll go to some beach tomorrow.

We'll stop at some restaurant on the way home.

are both perfectly acceptable. As a matter of fact, if you made the noun plural:

We'll stop at some restaurants on the way home.

That would imply that we are stopping at more than one restaurant.

Answer 2

Some is used to refer to a particular person or thing without stating which. For example,

Some customer called yesterday.