This is a complex question. Perhaps I should clarify that, if I'm asked by the minister to provide direct advice on a question like this, my office certainly would. Generally speaking, we're not asked to provide this kind of evidence or oversee that kind of detail.
Perhaps to help, I can say that there are a number of evidences that are gathered as part of the science advice. One is, of course, observation. The other one is estimates. The third one is a pattern, and the fourth one is the causal hypothesis, if you will. All these need to factor in when we look at the completeness of the evidence and the quality of the science and the evidence that is presented.