Levengood’s Crop-Circle Plant Research

I like how he distinguishes “genuine” crop circles from hoaxes.
Crop-Circle Plant Research by Levengood; Investigative Files (Skeptical Briefs June 1996)

There is, in fact, no satisfactory evidence that a single “genuine” (i.e., vortex-produced) crop-circle exists, so Levengood’s reasoning is circular: Although there are no guaranteed genuine formations on which to conduct research, the research supposedly proves the genuineness of the formations. But if Levengood’s work were really valid, he would be expected to find that some among the putatively “genuine” formations chosen for research were actually hoaxed ones-especially since even some of Meaden’s most ardent defenders admit there are more hoaxed circles than “genuine” ones.