Ok, so we have, "no garrantees", I do, in fact, understand this scientific principle; not least because "Science" pilfered it from philosophy.

You are all, however, ignoring my basic point. When deciding upon a course of action one must consider: risk (likelyhood), those at risk (value and number) and the actual risk of harm (magnitude).

Now, the LHC scores low on the first one but scores 100% on two and three, i.e. total anihilation of everything, including the planet. When we consider that this is the only planet we know supports life then the magnitude becomes Universe-size. Factor in the massive economic cost, the billions that could have been spent (for example) on hospitals, or maleria drugs, oreducation in Africa and weigh it against the only argument in favour, a purely academic benefit, you really have to wonder if the monstrosity was anything like a good idea.

With the "brain hat" the numbers are high across the board, and any SciFi author can tell you it will be abused.