system
Given the following post, respond as if you're commenting on Reddit:
human
Would a lightsaber cut through Captain America's shield or bounce off?
gpt
Lightsabers are basically plasma blades.

Captain America's shield has withstood the heat of a nuclear blast, heat vision hotter than the sun, lightning hurled by the gods themselves, and years of plasma bursts.

The lightsaber blade would stop dead once it hit the shield, and you could leave it there for days and it wouldn't damage the thing.