Answer:
Because it is contradicting itself
Explanation:
When the narrator is saying this, he cannot see if their is anything else around him, because it is too dark to see. But the darkness is all around him, so the statement is true in a way.
N. Scott Momaday
Referencing the trail he followed to understand the tales of his grandmother.
Sourcing is finding out where something/someone can be obtained
If it's just a random thesis:
Topic: Dog Fights
Thesis: Dog fights should be illegal, since they are a cruel way to abuse dogs for profit.
Opposing Thesis: Dog fights are entartaining, and should be continued.
