And the (correct) response that was given was that as a general rule, absolute certainty of something being safe is impossible to achieve. The truth is, there are very few things that have been as thoroughly tested by nature as the safety of these collisions. You may as well worry about, say, apples proving to be deadly poison that kills millions tomorrow, the survival of everyone who's eaten them up to this point being a statistical fluke.

Warren, etc. are starting from the assumption of danger, and insisting on an impossible absolute proof of safety, a standard they selectively apply only to the LHC or any other things they have decided are dangerous. It is flat out impossible to satisfy their demands, and the only reason they have to apply them to the LHC is that it's big and highly visible. This is not critical thinking, it's fabrication of a cause.