To be silent as the grave is to be totally silent, which in this context creates an ominous effect.
Context: Totally silent in a way that makes the situation seem ominous or foreboding, I swear it, de'il take me if I lie.
Hypothesis: silent as the grave, I swear it, de'il take me if I lie.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?