Is a Recount Required?
According to a recent study, there are thousands of papers supporting the theory that the observed tropospheric warming over the past century was caused by human beings and only a handful of papers opposing it, which implies that the AGW theory is not a matter of isolated results.
On the other hand, there haven't been thousands of studies showing that last conclusion. Maybe that is an isolated result. I'm reminded of the Onion headline: “Gore Calls For Recount Of Supreme Court Vote.”
I must also mention that the Global Warming theory comes in several strengths. It ranges from claims that are solidly-established fact (that most parts of the troposphere are warmer than a century ago), through claims that have a preponderance of evidence in support (that the observed warming may be due to coal burning), claims that are unproved but possible (that most parts of the troposphere are warmer than a millennium ago), to claims that are complete bulshytt (that the best way to handle this alleged crisis is to turn large parts of the economy over to anti-nuclear activists).
Also see my earlier comments.