Mixed impure academic
Mixed impure academic is a type of quizbowl question that uses both academic and pop culture clues within the same question. They are part of the NAQT question distribution under the Miscellaneous category, which also includes mixed pure academic questions. Mixed impure academic tossups may sometimes be common link questions.
For example, a mixed impure academic question about Pittsburgh might include Literature clues from August Wilson plays, historical clues about the French and Indian War, and sports clues about both the Pittsburgh Penguins and the Pittsburgh Steelers.
mACF tournaments generally do not include mixed impure academic questions as a separate category and their use is uncommon outside of NAQT events. Proponents of mixed impure academic questions see such questions as helping improve the conversion rates for questions for teams that might not know more difficult academic or pop culture clues alone while opponents tend to find such questions confusing and prefer questions that have either entirely academic or entirely pop culture-derived clues.
A HSQB thread with a brief discussion of mixed impure academic questions