論 (Kanji for make a case for)

Unlike the related term 　議 (which also means to discuss)、論 is not reciprocal. I.e. you need two people to 議, but only one to 論.

Onyomi

RON

RON Reagan talked in his speech, he made a case for keeping your Moms away from bookstores after she tried to mate with a Fabio cover.

論文(ろんぶん)	essay ★★☆☆☆ 論 (make a case for) + 文 (culture/ sentence) = 論文 (essay) an essay, like a senior thesis.
世論(よろん)	public opinion ★★☆☆☆ 世 (society) + 論 (make a case for) = 世論 (public opinion)
理論(りろん)	theory ★☆☆☆☆ 理 (reason) + 論 (make a case for) = 理論 (theory) theory, as in science or "theory vs. practice"
討論(とうろん)	discussion ☆☆☆☆☆ NP 討 (attack/discuss) + 論 (make a case for) = 討論 (discussion)

	Meaning	Hint	Radical
倫	principles	PERSON	人
論	make a case for	TALK	言

A PERSON has principles, but you TALK when you have discussion.