Personally, I don't know much about the nuances of this debate. When it comes to Ivory Towers and academics in general, I find myself going back and forth, feeling much respect at times and then quite the opposite at the oft dismissive-primitive behaviors of SOME academics...
When it comes to the world's ancient mysteries I tend to gravitate towards simplicity and the universal language of mathematics-probabilities. This approach I find to be a most useful way of deciphering the academic's real commitment to open-minded inquiry.
As such, diffusionisn or not, works like the one referenced below, present a fine barometer, or way of separating, convolution notwithstanding, the real skeptics from the rest.
We have, based on said Circle's immense improbability, what I believe is hard evidence of a global coordination plan spanning millennia which incorporates various cultures with no known or compelling interaction.
But maybe that's just me. I am yet to hear any intelligent or at least comprehensive dismissal of this body of evidence from among The Learned . Whatever the root cause, the Great Circle (et al) is something that the real skeptic - academic or not - will acknowledge as compelling while the others, when pressed, only seem able to say is another big coincidence.
Consider that an open invitation to refute the findings below :
Edited 1 time(s). Last edit at 14-Apr-18 17:03 by Poster Boy.