the proof of the pudding (is in the eating)
成語所屬單字pudding
the proof of the pudding (is in the eating) — 慣用語
1. You can only judge whether something is good or effective by trying it or puttin
1.慣用語
釋義
布丁好不好吃，吃了才知道；事物的好壞，要親身試過才知道
You can only judge whether something is good or effective by trying it or putting it to use, not by how it looks or sounds in theory.
例句
Critics praised the new app's design, but the proof of the pudding is in how users actually interact with it.
The team's strategy looks good on paper, but the proof of the pudding will come when we see the sales figures next quarter.