He argued so forcefully it was as if someone else were in the wrong.
Tips
usage
Almost always negative — the speaker sounds reasonable but is actually in the wrong. Don't use to describe a genuinely just argument; for that use 理直气壮.
mistakes
The character is 词 (cí, 'words'), not 辞. Also commonly misread as zhēn zhēn — the correct reading is zhèn zhèn (4th tone).