These are high levels of certainty even in research based on solid data with reasonable understanding of the mechanisms. (drtimball.com)
On this view, meaning can be derived from objective, ahistorical, nonhuman standards, and our knowledge of nature can reach high levels of certainty. (religion-online.org)
In other words, the skeptics should not be silenced but they should be seen to now have the burden of proof if they are implicitly arguing for no action until higher levels of certainty are achieved. (realclimate.org)