(By Jeremy Collins and Jay Latarche): "In order for a construction to trigger 1, there should be no other marker in the clause that signals polar interrogation, not even lack of finiteness compared to the affirmative. This excludes intonation, which may be different between questions and declarative statements. Please note, GB286 need not need be the only polar interrogative construction in the language to code 1. It may still be possible to code 1 for other constructions alongside this one, such as GB285, GB262, GB263, GB264."