The definition excludes two situations:
1. Two effective causes acting together.
2. One sufficiently strong cause treated as equivalent to two.
Merely being a personal name is not enough: زَيْدٌ is a proper name yet remains munṣarif. أَحْمَدُ, however, combines proper-name status with a verb-pattern cause.
Never classify every proper name as a diptote.
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Munṣarif and Ghayr Munṣarif — Definitions, Causes and Parsing
The definition excludes two situations:
1. Two effective causes acting together.
2. One sufficiently strong cause treated as equivalent to two.
Merely being a personal name is not enough: زَيْدٌ is a proper name yet remains munṣarif. أَحْمَدُ, however, combines proper-name status with a verb-pattern cause.
Never classify every proper name as a diptote.