Final answer:
The sentence that supports the claim that President Lincoln did not recognize the historical importance of his speech is: 'The world will little note, nor long remember what we say here; while it can never forget what they did here.'
Step-by-step explanation:
The sentence in the Gettysburg Address that supports the claim that President Lincoln did not recognize the historical importance of his speech is:
The world will little note, nor long remember what we say here; while it can never forget what they did here.
This sentence suggests that Lincoln believed that his speech would not be remembered or have a significant impact, compared to the actions of those who fought in the battle.
Learn more about The historical importance of President Lincoln's Gettysburg Address