system
Given the following post, respond as if you're commenting on Reddit:
human
[The Witcher] killing a Witcher, Steel or Silver?

This is a little embarrassing. I'm a Witcher who, do to complicated circumstances, needs to kill and Witcher. Just wondering... should I use my Steel Sword or my Silver Sword? Killing *each other* wasn't taught in my school, but since we're mutated with monster essences, might we share their weak against Silver?
gpt
Steel, all the way.

Witchers are pretty impressive, physically speaking, and can bounce back from some severe injuries, but in the near term they're still pretty human; a severed artery or ruptured organ is a *problem*, and steel will cut a Witcher. 

Also, keep in mind that your opponent is armed with a steel sword, and your silver sword wasn't meant to take the abuse of a swordfight. If you have to cross blades, they would be at an advantage, equipment wise.