Use of some/any with “limited or unlimited” meaning
It is possible to use any in affirmative sentences with the sense of an unlimited quantity:
Anybody in the office will give you the information, if you ask. (Here it doesn’t matter who you ask, they all will be able to help you)
– Which pizza do you want?
– I don’t mind, any one will be fine. (Here I don’t mind which of the many pizzas you give me. They all look good)
Some however, is used in a more limited sense:
– Somebody in the office will help you, if you ask. (Here it means that at least one person will be able to help you.)
– Which of the salads are nice?
– Some are very nice, but I don’t like the egg salad or the tuna salad. (I like some of them but not all of them)
– Most of them are nice but I don’t like some of them.