In a previous post entitled Anti-GMO Activist Roseanne Barr: GMOs caused Papaya Ringspot Virus, I showed that the papaya ringspot virus nearly destroyed the entire papaya industry on Hawaii in the 1990s and that researchers who genetically engineered the papaya to become resistant saved the day. I also demonstrated, contrary to the beliefs of celebrity and farmer Roseanne Barr, that the papaya ringspot virus was first reported in Hawaii in 1945 and that the genetically engineered resistant papaya was released in 1998. Thus, the GMO papaya did not cause or create the virus since the virus was present decades earlier on Oahu.
I tweeted the link to the previous post to Barr and she replied. Did she respond by writing a densely referenced blog post of her own? No. Did she link to scientific research contradicting what I had said? No. Did she even bother to write a short rebuttal? No.
Instead, she posted the following three tweets:
There are a couple of things that are worth noting:
Inability to respond to criticism: Barr showed a remarkable inability to make a coherent and thoughtful response to criticism. Nowhere in her tweets does she even begin to make an argument and there are no references to the primary scientific literature. Instead, she just asserted that she was not wrong. This point is further supported by the fact that she often wrote in all caps and used multiple exclamation marks.
Hasty generalization: Barr is unable to separate the large corporations she dislikes from single individuals (unrelated to those corporations) that criticizes her claims online. She just lumps those two together, which is clear when she uses phrases like “your false science”, “that you pay for”, “you invented it” etc.
Using pseudoscientific debating rhetorics: Barr used a classic debating tactic common to proponents of pseudoscience: the shill gambit. This consists of claiming, directly or indirectly, that the arguments provided by your opponent can be dismissed because he or she is allegedly bought by large corporations ad is only making those arguments because he or she is being paid to do so (i.e. a shill).
Mistrust of mainstream scientific research: Barr attempts to undermine the conclusions of mainstream scientific research by asserting that the funding of the research that developed the transgenic papaya came from a suspect source (presumably large corporations) and labeling it as “fake science”. However, if she had read some of the papers that I cited in my previous post, such as the review by Gonsalves (1998), she would have known that the development of the transgenic papaya was not funded by large corporations, but by the USDA (U. S. Department of Agriculture) Section 406 grant program (i.e. taxpayer funded research) Read more of this post