The evolutionary biologist and Oxford professor Richard Dawkins makes on his TED talk the rather interesting suggestion that we human beings, are in nature more similar to a wave than an object. In the sense that we are a persistent structure travelling trough a constant flow of atoms that only transiently form part of our body. Citing Steve Grand and his book Creation: Life and How to Make It, he argues that the body of a grown up man doesn't preserve any of the atoms that formed his body by the time of his earliest childhood's memories. Is that fact widely accepted by the scientific community?
I know that this question is a duplicate of Are all body atoms really recycled several times during a life? (or this one), however I want to put the emphasis on the atom constituents of cells, as the accepted answer there doesn't fully answer that question. Following those answers and the references within, a consensus seems to exist that most of the body is in constant renovation, with the exception of the cells in the cerebral cortex and the inner lens of the eye, whose cells persist trough life. But to what extent cellular metabolism replaces individual constituent molecules and atoms throughout those cell's life? Is that true also for DNA? What about mitochondrial DNA?
Are the processes that repair DNA damage operating only in damaged areas? Or do they constantly "repair" also healthy areas leading to the constant replacement of the atoms that constitute the DNA?
Others argue that tooth enamel does not regenerate or get replaced, been that what allows carbon dating to be accurate to the year of birth plus or minus a few months. However, as my question begins with a philosophical issue, I'm mostly interested in the atom constituents of the cerebral cortex. I am in particular aiming to figure out if we are more precisely described as a brain travelling through time or just a wave in a sea of atoms.