No, it doesn't work for you
We've all heard this ever. Some may even have used this argument: "it works for me." It seems that it works as a defense of the effectiveness of everything. From homeopathy to ouija including NLP or MMS. If you've tried it and you've seen that it works and maybe you even know more people that say that it works, we could say that its effectiveness is proved, right? Let's see why this argument could be wrong.