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@3RU7AL
A judge can lie and say they are unbiased when in-fact they are emotionally (implicitly) predisposed to one position (and or participant) over the other. Have you ever encountered a truly "unbiased" judge?
Nope so I can lie about having my mind changed in a debate.
Based strictly on your proposed, "measure of a person's thoughts", both debate styles appear to be equal.
Yes but in order to measure if someone is telling a truth you need to know what is going on inside their mind. Without it a discussion depending on convincing the otherside is not good grounds to measure a debate because we have no way in reading people's minds.
With perhaps some advantage to "self-moderated" because each participant would likely be expected to be biased toward themselves, (which denies any unfair advantage to either side) which would make a WIN exceptionally challenging and therefore exceptionally valuable.
Does self-moderate mean you can vote for yourself?
Do you think it would be fair to say that you have zero interest in convincing your debate partner?
Maybe but in a debate a person's interest should be convincing the audience so your question is irrelevant to what a debate is about.