What, If Anything, Can Skeptics Say About Science?

NASA visualization of arctic surface warming trends. NASA/Goddard Space Flight Center Scientific Visualization Studio, Larry Stock, Robert Gersten
As many skeptics know by now, legendary skeptical trailblazer James Randi set off a firestorm last week with two Swift blog posts about global warming. His first post carried his strong suspicion that consensus science on climate change is incorrect, while his followup post wondered “whether we can properly assign the cause to anthropogenic influences.”
Skeptical bloggers were swift to respond. Critics (including PZ Myers, Orac, Sean Carroll, and James Hrynyshyn) chastised Randi for speaking outside his domain expertise; for dissenting from current consensus science; and for lending his name to the disreputable “Oregon Petition Project.” Others, like Phil Plait, corrected Randi while sensibly reminding us that “anyone, everyone, is capable of making mistakes.” And, inevitably, global warming deniers seized upon the event. (One headline, at Britain’s Telegraph.co.uk, gleefully crowed “James Randi forced to recant by Warmist thugs for showing wrong kind of scepticism.”)
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