the exception that proves the rule
US /ðɪ ɪkˈsɛpʃən ðæt pruːvz ðə ruːl/
UK /ðɪ ɪkˈsɛpʃən ðæt pruːvz ðə ruːl/

1.
pengecualian yang membuktikan aturan
a case that does not follow a rule but, by its very existence, shows that the rule is generally true
:
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Most people here are quiet, but John is very outgoing; he's the exception that proves the rule.
Kebanyakan orang di sini pendiam, tapi John sangat ramah; dia adalah pengecualian yang membuktikan aturan.
•
My boss usually doesn't allow working from home, but he let me today because of my appointment. It's the exception that proves the rule.
Bos saya biasanya tidak mengizinkan bekerja dari rumah, tapi dia mengizinkan saya hari ini karena janji saya. Itu adalah pengecualian yang membuktikan aturan.