Board Thread:Questions and Answers/@comment-31067473-20170714200704/@comment-27136653-20170809113331

I said Toriel mentioned this about the other humans also. So they too had the same power.

And then I proceeded to answer a potential question, "why are they dead then?".

And by giving up, I meant they gave up on life.

Also, the soul shatters only upon activating the reload/reset ability. When a human gives up on life, they die, but the soul is preserved. The sheer fact that it shatters allows the human's consciousness to travel back in time.