I'm not sure what is intended by the parent, but Pia is the source to which all mentions of this theory lead, in my limited research (or Pia and Mario Vittone,

I'm not sure what is intended by the parent, but Pia is the source to which all mentions of this theory lead, in my limited research (or Pia and Mario Vittone, the author of the article which heavily cites Pia). So the parent is not evidence of broader acceptance by others.