言之凿凿 emphatic
Explanation
形容说话非常肯定，确凿可靠。
describes a statement that is very convincing and undeniable.
Origin Story
唐朝时期，长安城里住着一位名叫李白的著名诗人。一日，李白的朋友王维来访，向他讲述了他在江南旅行时所见所闻。王维言之凿凿地说，他在苏州看到了盛开的梅花，并用诗句描绘了梅花的美丽。“墙角数枝梅，凌寒独自开。遥知不是雪，为有暗香来。”李白听后，不禁赞叹王维的文采，并对江南的景色充满了向往。 然而，李白的另一个朋友杜甫却对此表示怀疑。杜甫说道：“江南此时节，气候还寒冷，梅花怎么可能会盛开呢？”王维依然言之凿凿，并拿出他拍摄的梅花照片作为证据。杜甫这才相信了王维所说的话，并对王维的江南之旅充满了羡慕。 这个故事告诉我们，有时候，即便没有亲眼所见，只要证据充分，言之凿凿，我们也应该相信。当然，也要时刻保持警惕，防止被虚假信息所欺骗。
During the Tang Dynasty, a famous poet named Li Bai lived in Chang'an. One day, Li Bai's friend Wang Wei visited him and told him about his travels in Jiangnan. Wang Wei emphatically stated that he had seen blooming plum blossoms in Suzhou, and he vividly described the beauty of the plum blossoms using poetry. Li Bai was impressed by Wang Wei's talent and yearned for the scenery of Jiangnan. However, another friend of Li Bai, Du Fu, expressed doubts. Du Fu said, "In Jiangnan at this time of year, the weather is still cold; how could the plum blossoms be blooming?" Wang Wei remained adamant and showed photographs of the blooming plum blossoms as evidence. Only then did Du Fu believe Wang Wei and envied Wang Wei's trip to Jiangnan. This story tells us that sometimes, even without witnessing it ourselves, if the evidence is sufficient and the statement is convincing, we should believe it. Of course, we must always remain vigilant and prevent being deceived by false information.
Usage
用于描写说话有依据，令人信服的情况。
Used to describe a situation where something is well-supported by evidence and is convincing.
Examples
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他说的这件事，言之凿凿，令人信服。
ta shuode zhejian shi, yan zhi zaozao, lingren xinfu.
His account of the incident was very convincing.
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证据确凿，言之凿凿，不容置疑。
zhengju quezao, yan zhi zaozao, buryong zhiyi
The evidence is irrefutable and leaves no room for doubt.