Aporia means to be at a loss, doubt, or an internal contradiction in a text, argument, or theory. This device is commonly seen in rhetorical questions where the author is questioning oneself and swaying between two or more ideas, exercising uncertainty.  It can also be described as a state of puzzlement in philosophy and in rhetoric, a state of doubt.

Literary Example:

“To be, or not to be: that is the question.

Whether ‘tis nobler in the mind to suffer

The slings and arrows of outrageous fortune,

Or to take arms against a sea of troubles,

And by opposing end them? To die: to sleep;

Than fly to others that we know not of?

Thus conscience does make cowards of us all.….” -Hamlet

Visual Example: