I want to know the answer to the following question:
What unpopular philosopher's text did Avicenna learn from?
All the background I'm provided with is that "Avicenna was taught some extent of philosophy books such as Introduction (Isagoge)'s Porphyry (philosopher), Euclid's Elements, Ptolemy's Almagest by an unpopular philosopher,". Is that enough to answer the question?
Answer: no