My grandpa on my Dad's side actually had 3 sets of teeth!

What an excellent story and perfect evidence a third set of teeth can in fact be achieved with ease. And knowing he did this in his 20s makes me wonder if we can't grow a fourth set? Perhaps we have the ability to grow a new set every few decades or so. It's just that as we get older the build-up of toxins & frequencies begins to take its tole and the cycle of new teeth stops. Did your grandfather have anything particularly different about his diet?

I like your theory it is part of our evolution, though I would say we had this ability in the past and evolution is in fact a cycle. The two liver story certainly supports the idea of the body changing itself to fix a problem! Amazing.