One thing that I observe frequently on this site, is "armchair experts" trying to correct "the grunt in the field". While the grunt and his family have been feeding the community for millennia, the academics pause their ethereal discussions, to go have lunch in the university restaurant without ever actually realizing that their food comes from the Earth and that grunt was partially responsible, and that grunt might know a good bit more than the academics about growing food.
One time at farmer's market, a professor from the University said to me, "What, are your credentials to be a farmer?" I laughed out loud, spread my arms wide to encompass two tables full of fresh, healthy, better-than-organic, tasty vegetables, and replied, "My resume is spread out on the table in front of you."
I tend to simply avoid having discussions with academics, and proof seekers. I'll just post photos of a table full of vegetables, and let it bother them, that someone that is so wrong, can perpetually produce so much food, using such deprecated methods and germplasm.