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to discuss; to talk about; to deal with (a topic)
to argue; to dispute
to take into consideration; to make an issue of
専門家がテレビで経済問題を論じていた。
Experts were discussing economic issues on TV.
教授が熱心に論じた。
The professor argued passionately.
その問題については後で論じることにしよう。
Let's discuss that issue later.