I'm talking about the logic of it. We can't possibly know what's happened, because we had to have studied everything in advance. I'm saying there is actually a way of telling where methane came from, and some of the things that have been talked about, in terms of potential contamination near oil and gas developments, have actually been shown to be biologically determined or to have created methane from the near surface.
On November 23rd, 2010. See this statement in context.