Daas Torah page 206
Ramban (Introduction to Milchemes HaShem): For those who look at my sefer, don’t say in your heart that all my responses to the Ba’al HaMeor are in my eyes absolutely correct and obviously true and would therefore force everyone to acknowledge them. For everyone who studies our Talmud is well aware that concerning disputes between the commentaries that there are no absolute proofs or absolutely unanswerable questions. In fact, in this area of wisdom, things are not clear and unambiguous as we find in mathematical proofs. The main effort is to show that one position is more likely and more reasonable than the alternatives - rather then to show that one is entirely correct and the other is entirely wrong.