Possible Clues:

• Two-option question type
• Like questions in 20 Questions
• Straightforward kind of question
• Pair of options for some test questions
• Like “20 Questions” questions
• Like some questions with only two answers
• Dichotomous, as some questions
• Like binary questions
• Dichotomous descriptor for some questions
• Like a question for which 'maybe' is not an option