Some is either a quantifier or has no bearing on the logical relationship, it is not a sufficient condition indicator. Usually when there are other conditional statements in the stimulus and/ or stimulus involves formal logic and a combination of universal, i.e. all/ none and particular premises, i.e. some, many, few, most - then "some" is best understood as a quantifier. If the stimulus involves no conditional statements, "some" usually has no special meaning in this context.
