> But how do we know? Is it a guess? We can be pretty certain that something is happening, and we are not just seeing randomness. We can also be certain enough

> But how do we know? Is it a guess? We can be pretty certain that something is happening, and we are not just seeing randomness. We can also be certain enough for practical purposes that we know what the cause is. In a situation where the consequences will be nothing short of catastrophic on a global scale and we are already far too late, insisting on 100% academic purity is really not a sensible position.