The Raven Any Indication The Narrator Has Dreamt This Is There Any Indication That The Narrator May Have Dreamt The Entire Episode Of The Raven By Edgar Allen Poe?

Is there any indication that the narrator may have dreamt the entire episode of The Raven by Edgar Allen Poe? - the raven any indication the narrator has dreamt this

Are there signs that the narrator could have dreamed the whole episode of The Raven by Edgar Allan Poe? I do not understand this question, although I read the poem several times. One reason would be very grateful if possible.