核心畫面
You can think of it as the state where a question has stopped being open: there is nothing left to wonder about, no gap where doubt could sit. The word points sometimes at the person (they have no doubt) and sometimes at the situation (there is nothing left to decide), but the picture is the same closed door either way.
可以想成一件事的問號已經被關掉了：沒有留下任何可以懷疑的縫隙。這個字有時候指人心裡的狀態（他一點都不疑惑），有時候指…更多收起
可以想成一件事的問號已經被關掉了：沒有留下任何可以懷疑的縫隙。這個字有時候指人心裡的狀態（他一點都不疑惑），有時候指事情本身的狀態（結果已經不會再變），但畫面是同一扇關上的門——差別只在你站在門的哪一邊看。原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
certaintynoun/ˈsɝtn̩ti/
- 1
The state of being certain.
- with certainty
- moral certainty
- 2
An instance of being certain.
- 3
A fact or truth unquestionably established.
- Certainties are uninteresting and sating.
- There is a certainty attainable. A certainty of feeling will arise through the very contemplation of Jesus. But there is also attainable a certainty of Reason.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。