Ricoldo ridiculed the Qur’an by imputing later Islamic traditions onto its short texts.

Evidence

Similarly, Ricoldo contended that the Qur’an does not agree with the authentic revelations, and contains fabulous tales. The Muslims themselves would realise this, if their learned men allowed them to see the Christian Scriptures. He exploited their inherent absurdity rather more than their conflict with Scripture. He summarised the story of Solomon in the stirah an-naml, and, assuming the short Qur’anic text necessarily to imply the whole Islamic tradition subsequently attached to it, he related the death of Solomon and the story of Haritit and Marit, in such a way as to make them seem as ridiculous as possible, and to impute all this to the Qur’an. — Norman Daniel, Islam and the West, 356

Categorization

• XREF: This is a medieval precursor of the modern technique of treating a canonical text as implying everything later exegesis says — reminiscent of how modern critics of scripture are accused of strawmanning.
• DEFINE: Shows the rhetorical move of collapsing a text with its accumulation of commentary tradition, a recurring polemical fallacy.