Answer:
The narrator affirms, astutely, to act as wisdom and is aware of what he is doing. However, in my opinion this does not confirm his sanity.
Explanation:
The narardor is acting crazy, but he knows that the crazy are not taken seriously and he wants everything he says to be taken seriously by the reader. For this reason, he claims that he has characteristics that mad people do not have, to confirm his sanity. These characteristics are cunning, the ability to act wisely and the awareness of your actions. However, the way the narrator plans a murder and the reasons that lead to it, are completely insane, which makes him seen as crazy anyway.
