Platonic dialectic is a conversation between two people where by means of asking simple, unambiguous questions and providing yes or no answers the participants can decide if they think a proposition is true or not. While the ideal outcome is agreement about whether a proposition is true or false, sometimes one participant will accept the proposition as proven while the other won't. Sometimes both will decide the evidence is inconclusive or the conversation flawed.
A proposition is a simple declarative statement that might be either true or false. Simple in this case means a single predicate. For example, 'The minimum wage should be set by the government at $15 and hour' is actually 3 propositions. There should be a minimum wage. The minimum wage should be set by the government. The minimum wage set by the government should be $15 an hour. If the conversants are willing to grant the first 2 propositions, then they can start with the 3rd.
The questions seek clarification of definitions and relationships among terms, what is preferable or superior or greater or the opposite or mutually exclusive, and so on. While the thinking is meant to be binary -- the rule of non-contradiction applies -- ambiguities should be admitted and discussed rather than ignored or denied. Clarification that leads to an admission of ignorance is better than a false conclusion no matter how wholeheartedly accepted. It is better to be ignorant than delusional.
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