Birthmarks
It was just his dream that showed him the mark that was already there. It proves nothing, so one should not speculate without any evidence.
The research you cited doesn’t have concrete pieces of evidence to make some formidable claim. It is mostly speculative, interpreting the phenoman in a certain way. While other interpretations of the same phenomena are not ruled out. So no question can be raised on the basis of speculative research. People receive others thoughts and transmit them too. It gives the whole thing another dimension.