Answer:
He uses rhetorical questions to challenge others’ opinions.
Step-by-step explanation:
"they may not have remembered when they saw their works that these were but imitations thrice removed from the truth, and could easily be made without any knowledge of the truth, because they are appearances only and not realities? Or, after all, they may be in the right, and poets do really know the things about which they seem to the many to speak so well?" These are rhetorical questions, nobody answers them but they are important to what dialogue.