Board Thread:General Discussion/@comment-4504826-20160426040035/@comment-26814804-20160427002040

Yossipossi wrote: Imma Quote the wikia real quick:  The death sound is heard from off screen, and the protagonist's EXP is set to 99999, granting them LV 20 (regardless of their EXP before the encounter – in normal playthroughs, it will always be 50000).

EXP stands for EXECUTION points.

Which shows how much you KILLED.

MEANING SANS IS DEAD. EXP stands for Execution Points, not killing points.

I'mma quote the dictionary real quick.

"The carrying out of a sentence of death."

In other words, it is the act of killing an the person that equates to execution, not their death. If you hang someone, but they live, officially, they have still been executed. You hit Sans and lowered his HP to 0, therefore "executing" him.