In reality, Thomas was deeply disturbed by the spread of Averroism and was angered when he discovered Siger of Brabant teaching Averroistic interpretations of Aristotle to Parisian students.
Pada kenyataannya, Thomas sangat terganggu dengan merebaknya Averroisme dan merasa marah ketika ia mendapati Sigerus dari Brabant sedang mengajarkan penafsiran Averroistik mengenai Aristoteles kepada para mahasiswa Paris.