The very ability to formulate the statement requires knowledge that contradicts the belief.
Assume "genetically modified" is the teacher's password to them.
Oh, I'm sure it's very similar to "chemicals". But even allowing for that I find it painful. Mostly because, while I find your statement likely, I strongly wish it weren't true. Furthermore, despite living in a rather conservative state (Arizona) I have never encountered a person with such a paucity of understanding. For this to comprise, then, roughly half of the nation?
... Eh. I should know better, I suppose; just the other day I ran into someone who told me in absolute terms that no only didn't she know what a counterfactual was, she had abs...
Encountered at: https://whyevolutionistrue.wordpress.com/2011/03/20/click-and-weep/scientific-literacy/