The less informed someone is about a topic, the more likely they are to overestimate their knowledge of it. This is a cognitive bias known as the Dunning-Kruger effect; it's a simple, compelling theory—and it may be incorrect. Is industry inherently untrustworthy? Activist groups have promoted that idea for decades, but there's much more to the story. Anti-GMO advocate Vandana Shiva is hailed as a visionary by her followers and attacked as a crank by her critics. Who is the real Vandana Shiva?

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Join special guest Dr. Cami Ryan and GLP contributor Cameron English on episode 229 of Science Facts and Fallacies as they break down these latest news stories:

* Debunking Dunning-Kruger: It’s widely believed that the less you know, the more you think you know. Does everyone think they’re better than average?

The Dunning-Kruger effect is widely accepted in scientific circles. It's often assumed that people challenging the expert consensus on a given topic do so because they overestimate their knowledge of the subject. However, recent research has started to poke some holes in this seemingly universal cognitive bias. These studies have confirmed, as Dunning-Kruger asserts, that everybody thinks they're smarter than average. But that's where the theory's validity ends, some mathematicians argue. They say incompetent individuals are often keenly aware of their incompetence and able to accurately assess their limited understanding. Are these findings enough to debunk Dunning-Kruger?

* Viewpoint: Simplistic anti-agrobiotech narrative — ‘Companies lie; activists are outraged; regulations are tightened further; companies lie again… Wash, rinse, repeat’

Both reporters and members of the general public seem to believe that industry is inherently greedy and dishonest, while the activists who attack industry are motivated by science and a desire to protect consumers and the environment. According to one risk expert, though, this perspective is deeply flawed. Although companies certainly do behave unethically sometimes, they are often incentivized to do so by activists who support excessive regulations that businesses can't possibly comply with. Is there any real-world evidence to support this idea?

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* Viewpoint: Queen of Green Social Justice or Reckless Green-Revolution Rejectionist — Who is the real Vandana Shiva?

Vandana Shiva is a known promoter of fringe, dangerous ideas. She's claimed that the first SARS virus originated in farm an...