M is telling lies, hoping to turn them into the truth.
M isn't saying that you can avoid Slendy by getting up high because it's worked for him, but rather because he hopes that if he can get enough people to believe it that Clap Your Hands If You Believe will make it true.[*] But if that's the case and people read this, then Clap Your Hands If You Believe will untrue it.
- Of course then you know it will work because you believe it will work. You would have to weaponize Cognitive Dissonance to do so though.
