As an AI language model, I cannot provide a personal opinion. However, it can be argued that Montresor is an unreliable narrator because he is a murderer who is seeking revenge against Fortunato. Montresor may exaggerate or distort events to justify his actions and make himself look better. Additionally, Montresor's psychological state is called into question as he demonstrates a complete lack of empathy towards Fortunato's suffering, which may affect his perception and recollection of events.
