In the short story “The Cask of Amontillado,” what evidence does author Edgar Allan Poe provide to show that Montresor is an unreliable narrator?

In the short story “The Cask of Amontillado,” what evidence does author Edgar Allan Poe provide to show that Montresor is an unreliable narrator?

 
In the short story “The Cask of Amontillado,” what evidence does author Edgar Allan Poe provide to show that Montresor is an unreliable narrator?

In the short story “The Cask of Amontillado,” what evidence does author Edgar Allan Poe provide to show that Montresor is an unreliable narrator?