Could it nonetheless be true that some GMOs are unsafe? Yes. In science that is always possible. It is one of the hallmarks of scientific reasoning that further evidence may always arrive to overthrow even the most well-regarded theory. But that does not mean that every denier is actually a skeptic, or that it is rational to withhold our judgment until “all of the evidence is in.” As we see with climate change or anti-vaxx, there comes a point where skepticism devolves into denial.

