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In reasoning and argument mapping, a counterargument is an objection to an objection. A counterargument can be used to rebut an objection to a premise, a main contention or a lemma. Synonyms of counterargument may include rebuttal, reply, counterstatement, counterreason, comeback and response. The attempt to rebut an argument may involve generating a counterargument or finding a counterexample.〔Rahwan, Iyad ''et al.'' (2009). 〕 To speak of counterarguments is not to assume that there are only two sides to a given issue nor that there is only one type of counterargument.〔 For a given argument, there are often a large number of counterarguments, some of which are not compatible with each other.〔Zwiers, Jeff. (2008). 〕 A counterargument might seek to cast doubt on facts of one or more of the first argument's premises, to show that the first argument's contention does not follow from its premises in a valid manner, or the counterargument might pay little attention to the premises and common structure of the first argument and simply attempt to demonstrate that the truth of a conclusion is incompatible with that of the first argument. __NOTOC__ ==Speech== In a debate or in a speaking context, a counterargument can be handled in a variety of ways.〔Sprague, Jo ''et al.'' (2008). 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「counterargument」の詳細全文を読む スポンサード リンク
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