Rat poison has no effect on snails, and they just get super fat 'cause they gorge themselves in boxes of rat poison.
There's probably something wrong with it. You just haven't thought it through.
Madness string 83970
Under normal circumstances the liar is defeated by reality, for which there is no substitute; no matter how large the tissue of falsehood that an experienced liar has to offer, it will never be large enough ... to cover the immensity of factuality.