He tries to outtalk his opponent by using sophistry.
詭弁 means sophistry or a deliberately misleading argument, while レトリック simply means rhetorical style and is not inherently deceptive.
sophist
Standard modern kanji form.
Outdated kanji form using 辯; rarely seen in modern texts.
Rarely used kanji form.
Rarely used kanji form.
From Chinese 詭辯/诡辩 (guǐbiàn). The kanji 詭 means 'deceive' or 'lie', and 弁 means 'speech' or 'argument'.