Board Thread:General Discussion/@comment-37914689-20190212180148/@comment-25350022-20190212204756

True. Bot could also argue that muffle manipulates your footsteps so that it compromises the hearing ability of others, so they can't detect you. Same goes for invisibility. You are inhibiting others from visually detecting you, which is compromising their mind.

Small rant:

Illusion meaning - an instance of a wrong misinterpreted perception of a sensory perception.

Meaning that what you're perceiving contradicts reality. So when someone is muffled, you may not hear someone's footsteps, but those footsteps still exists. And with invisibility, you may not see someone, but they are certainly still there.