To have weak reasoning disguised by elaborate rhetoric; where the argument is not as strong as the eloquence used to present it.
他的辩论虽然辞藻华丽，但内容空洞，理不胜辞，最终未能说服评委。
Although his debate was adorned with beautiful words, the content was hollow, and the reason could not overcome the rhetoric, ultimately failing to persuade the judges.
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