Difference: 些 and 有的 A while ago I learned that some was 些 or 一些, but now I've also learned that there is another way to say some, 有的. My teacher didn't go into the difference in class and I forgot to ask her afterwards. Is there a difference in meaning and/or usage or are they totally synonymous?

Thanks in advance，
William
The main grammatical difference, which hints to the usage difference, is that 些 is indeed a classifier.

This implies 些 gets involved when you're counting stuff. Now you say: but 些 is supposed to mean "some", I'm not really counting anything! 
Well nevertheless you are, even though you are not expressing a precise quantity.

Now, let's add a piece to the puzzle. 
As you may know, classifiers in chinese are also used to determine a noun, i.e. they replace the determinative article in English. That's why 那个苹果 can be translated as "that apple" but also "the apple", that one apple we talked about earlier in the conversation. 

Our 些 in turn carries the same semantic value. 

一些苹果 some apples

那些苹果 these apples / the apples

Therefore 些 is used when you're talking about a narrow topic, something circumscribed to a pool of common knowledge between you and your interlocutors.
Whereas 有 means "there is" and 有的expresses a general existential trait, as in 有的人喜欢吃苹果 = "there are people who like to eat apples" = "some people like to eat apples".

Tl;dr

些 particular, unspecified but possibly finite number 

有的 general