Answer
See explanation.
Work Step by Step
The cosmological principle (page 1504) says that the universe looks the same in every direction, no matter where we are located. There is no “special” point in the universe.
If you were on the “edge”, you would be in a special place where the universe looks different on a large scale, and that violates the cosmological principle.
It’s like living on the surface of a sphere and asking if there is a special point on the surface itself, or if there is an edge; there isn’t.
