无庸置疑 undoubtedly
Explanation
形容事情或理由非常清楚明白，根本没有怀疑的必要。
It describes something that is so obvious or well-reasoned that there is no room for doubt.
Origin Story
话说唐朝时期，一位名叫李白的诗人，他的才华横溢，文采斐然，无人能及。他写下的诗句，意境深远，情感真挚，总是能够引起人们强烈的共鸣。有一天，李白在长安城里游玩，偶然听到有人在议论他的诗。有人说李白的诗过于华丽，缺乏内涵；有人说李白的诗过于晦涩，难以理解。李白听了这些议论，并没有生气，反而笑着说道："我的诗，无庸置疑，是具有独特风格的艺术创作。"
In the Tang Dynasty, there was a poet named Li Bai whose talent and literary skills were unparalleled. His poems were profound and emotional, always resonating deeply with people. One day, while in Chang'an, Li Bai overheard people discussing his poetry. Some said his poems were too ornate and lacked substance; others said they were too obscure and difficult to understand. Li Bai, instead of getting angry, simply smiled and remarked: "My poetry, undoubtedly, is unique artistic creation."
Usage
作谓语、宾语、定语；表示事情或理由非常清楚，没有怀疑的余地。
Used as predicate, object, or attributive; it expresses that something or a reason is very clear and leaves no room for doubt.
Examples
-
他的说法无庸置疑，大家都相信他。
ta de shuofa wuyong zhiyi, dajia douxiangxin ta
His statement is beyond doubt; everyone believes him.
-
证据确凿，此事无庸置疑。
zhengju quezao, cishi wuyong zhiyi
The evidence is conclusive; the matter is indisputable.