After opening statements (1.5 to 2 minutes each) and adding in closing statements (1 to 2 minutes each) and adding in the lengthy editorialized moderator questions (20 seconds), each candidate will be lucky to get a total of 3 minutes response time.
Ten is just too many for the debate to have any meaning.
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The kiddy-table debate may turn out somewhat better, since it only has 7 participants.
WHO will be asking the questions?