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Bailey on "Consensus"

Another former Brookes Fellow, Ron Bailey, writes in Reason today on green activists' speaking out of both sides of their mouth when they say "scientific consensus":
[T]the overwhelming scientific consensus is that current varieties of genetically enhanced crops are safe to eat and don't pose unusual risks to the natural environment. But that isn't stopping Greenpeace from waging a global "Say no to genetic engineering" campaign or the Friends of the Earth from demanding a GM Freeze. Perhaps the idea of scientific consensus is not all that it's cracked up to be. After all, scientific consensus does not mean "certain truth." Whatever the current consensus of any scientific issue is can change in the light of new research. Nevertheless, environmentalist ideologues accuse those who question the climate change consensus of bad faith and worse. But aren't they exhibiting a similar bad faith when they reject the broad scientific consensus on genetically modified crops?