This may seem like a stupid question that's been brought up several times but it is regarding the possible creation of mini-black holes at the LHC. It's said that these MBH's pose no threat to the planet because of their small size and the fact that they will evaporate by Hawking radiation. However, while there is much mathematical and theoretical evidence pointing towards HR, it has never been physically observed. So how can we be sure that the MBH's will simply evaporate? Basically, the saying is that, if HR is correct, MBH's evaporate. Isn't that a pretty big if?