[nevergotenglish]

Sometimes you use few with a countable name. Some is for not countable. A few friends means that you know perfectly how many friends you have, if you have some friends the number of friends you have is subject to a great uncertainty from 1 to infinity. So some few is saying you have few but are uncertain or don't want to say how many, but that is not very rational. Why this reasoning? Because it can help you to avoid repeating the same error (or unidiomatic expression). The simple fact of analyzing any mistake it a way of becoming vaccinated against it.