>> “GM crops have never been proven safe,” Pelegrina asserted. > Well, you can't prove a negative. If someone claims that GM crops have never been proven safe

>> “GM crops have never been proven safe,” Pelegrina asserted. > Well, you can't prove a negative. If someone claims that GM crops have never been proven safe, they should be expected to provide evidence to support that claim. I don't think that the claim being negative should shift the burden of proof away from the claimant.