(Fortitude and one of the Sibyls are attributed to Perugino's 17-year-old pupil, Raphael. )
Raphaeal was not responsible for Fortitude.
mnli hypothesis: Raphaeal was not responsible for Fortitude. premise: (Fortitude and one of the Sibyls are attributed to Perugino's 17-year-old pupil, Raphael. )