Consensus not demostratable
Assertion being challenged by Peiser is that there is a consenus. The assertion is: " (1): For the first time, empirical evidence was presented that appeared to show an unanimous, scientific consensus on the anthropogenic causes of recent global warming. "
Pesier has shown without doubt that the Nature paper was poorly reviewed, the claim of consensus was not empirically proven and results of this search certainly do not indicate an unanimous scientific censenus "on the anthropogenic causes of recent global warming".