system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator] How would Skynet even know that its plan to kill John Connor or Sarah even worked?

The only answer I can think of is to find the remains (If any) of the units it sent back.
gpt
It's more like Skynet sacrificed its own timeline to build an even stronger Skynet. The point of sending time-travelling terminators isn't just to assassinate future resistance leaders, it's also to upgrade Skynet to the point where it becomes impossible to destroy just by attacking a central server.