Context: A common misperception is that the Supreme Court is the only court that may determine constitutionality; the power is exercised even by the inferior courts. But only Supreme Court decisions are binding across the nation. Decisions of a Court of Appeals, for instance, are binding only in the circuit over which the court has jurisdiction.

Question: Which courts decisions are binding across the entire United States?
Answer: the Supreme Court

Question: Which court is the only one able to determine constitutionality?
Answer: Unanswerable

Question: Which power are inferior courts unable to exercise?
Answer: Unanswerable

Question: Which courts' decisions, other than Supreme Court, are binding across the country?
Answer: Unanswerable

Question: Which is the only court unable to determine constitutionality?
Answer: Unanswerable