Question of law determines the judge's role in statutory interpretation and in distinguishing law from fact. The expression question of law refers to issues reserved for judicial determination about the application or authoritative content of legal rules, including matters excluding jury decision, and may involve factual elements yet remain legal in character. Determining such questions requires purposive statutory interpretation: textual analysis combined with context and legislative purpose so that words and provisions fit the statute's scheme and guide whether an issue is legal and for the judge to decide.