Zaydun akhūka: the second phrase re-identifies the same person — whole-for-whole.
Zaydun Jaʿfarun: the second name repairs a slip of the tongue — error-correction badal.
Both second nouns are nominative; the speaker’s intention distinguishes them.
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Correction Versus Re-Identification
Badal: Definition, Four Types, and Parsing
Zaydun akhūka: the second phrase re-identifies the same person — whole-for-whole.
Zaydun Jaʿfarun: the second name repairs a slip of the tongue — error-correction badal.
Both second nouns are nominative; the speaker’s intention distinguishes them.