Seriously,revisability of logic is referred to logical systems,but not the logic itself.If logic can be referred to formal structure of argument,if we regard logic as objects of study,if revisability of logic is referred to logical validity,we should believe that logic is not revisable.If we regard logic as some study,this logical systems may contains mistakes and then is revisable.If revisability of logic is referred to logical systems,in the sense of replacement,we can think that the logical systems can be revisable.The diversify of logical systems,the emergence of new logical theories is a development tendency of modern logic.
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