讨论

讨 = 寸 + 讠 : Tecumseh (t) is asking (讨) an advertising column (讠) inside of the aorta (ao3) for a little snack, and indeed, the column ejects some chocolate bars, which causes Tecumseh to thumb up (寸) at it.

论

論

lún = lu + (e)n2

abbr. for 論語|论语[Lun2 yu3], The Analects (of Confucius)

论

論

lùn = lu + (e)n4

opinion / view / theory / doctrine / to discuss / to talk about / to regard / to consider / per / by the (kilometer, hour etc)

论 = 仑 + 讠 : Lenny Lemur (lu) finds an advertising column (讠) in the encampment's bathroom ((e)n4) and on it a discussion (论) of his blackcurrant wine (仑). The discussion (论) is very negative and so Lenny angrily throws blackcurrants at it, messing up the ad.