I agree with your criticisms. It doesn't seem clear that these rocks were used for what they claim. I recently found what I believed was an arrowhead. It is sym

I agree with your criticisms. It doesn't seem clear that these rocks were used for what they claim. I recently found what I believed was an arrowhead. It is symmetrical and sharp on both edges, but it is not an arrowhead. It is a rock that looks like an arrowhead and my wishful thinking pushed it the rest of the way. If I were that researcher I would have claimed that I found the real thing.