Dictionary / Vocabulary / 論陣を張る
ろんじんをはる
to take a firm stand; to argue about
「広辞苑にこう書いてあります」と言って、広辞苑を唯一の拠り所に論陣を張る人がよくいる。
There are a lot of people who say, "it says this in Koujien," and use that dictionary as the only grounds for their argument.