the proof of the pudding is in the eating
成語所屬單字proof
the proof of the pudding is in the eating — 慣用語
1. You cannot truly judge the quality or value of something until you try it or use
1.慣用語
釋義
事物的好壞須經實際體驗才能判斷；布丁好不好吃，吃了才知道
You cannot truly judge the quality or value of something until you try it or use it for yourself.
例句
The new software looks good on paper, but the proof of the pudding is in the eating — we need to test it with real users.
Amani was skeptical about the recipe, but the proof of the pudding is in the eating, and everyone asked for seconds.