system
Given the following post, respond as if you're commenting on Reddit:
human
Does the moon get earthlight, like we get moonlight?

While the moon is on the sun side of earth, does the dark side of the moon get reflected light from earth. Would the earth have "phases" like the moon or is the moon not large enough to do that?
gpt
Certainly.  The dark part of the Moon is faintly visible because of this.

The phases depend only on the angles of the Sun-Moon-Earth triangle, not on the sizes of the Earth or Moon.  If you swap the positions of the Earth and Moon, someone on the Moon would see the same Earth phase that an Earthling would have seen before the swap.