Did he have 'enough' (to jest kolokw. i to slowo nie jest najlepsze tutaj, moze 'sufficient' albo 'adequate') formal education to write the works attributed to him?
What signs of being a writer are contained in his last will?
What DOES his funerary monument looks like?
The questions are asked 'but' (dla mnie to tutaj nie pasuje, bo mozna napisac 'and') the answers 'are' (,oze lepiej 'can be') found, as well.