A medieval chronicler invented a confrontation between Isidore and Muhammad

Evidence

But Lucas adds a brief but significant episode gleaned from his reading of an anonymous eleventhor twelfth-century Life of Isidore: Muhammad came to Spain, debarking near Córdoba, to preach his doctrine. Isidore, returning from Rome, ordered his men to arrest Muhammad, but alas the devil warned Muhammad, who fled to Africa. Lucas imagines his hero confronting the prophet of Islam and making him flee, a satisfying scene that Lucas had to include, though probably aware of its implausibility. — John V. Tolan, Saracens, 937

Categorization

• CANDY: The image of Saint Isidore ordering Muhammad arrested atop Córdoba is a wonderfully absurd historical anecdote.
• FICTION: The devil-warning-Muhammad detail is a small narrative flourish suggesting medieval hagiographic storytelling technique.