Mozarabic apologists argued for the incarnation using Koranic precedents Muslims already accept

Evidence

All five of the Mozarabic texts argue for the possibility or plausibility of the incarnation based on analogies to events attested in the Koran (and hence accepted by Muslims). The Koran acknowledges that God spoke directly to Moses through the intermediary of the burning bush. Both the Tathlîth alwahdânîyah and the priest Augustine’s Mashaf al-‘âlam argue that God is present, incarnated, in Jesus in the same way that he was present in the burning bush. — John V. Tolan, Saracens, 825

To defend the incarnation to Muslims is a more difficult task. All five of the Mozarabic texts argue for the possibility or plausibility of the incarnation based on analogies to events attested in the Koran (and hence accepted by Muslims). The Koran acknowledges that God spoke directly to Moses through the intermediary of the burning bush. Both the Tathlîth alwahdânîyah and the priest Augustine’s Mashaf al-‘âlam argue that God is present, incarnated, in Jesus in the same way that he was present in the burning bush. — John V. Tolan, Saracens, 825

Categorization

• XREF: The structure — grounding an argument in premises the opponent already accepts — parallels persuasive techniques found across religious and political apologetics.
• DEFINE: Concrete example of cross-scriptural argument-by-analogy technique — a counterpoint showing medieval Christians found common ground inside the Koran, complicating a pure ‘clash’ genealogy.
• corroborated: 2 independent passages support this claim — John V. Tolan, Saracens, 825