Hi David.
Can I please clarify what you mean by 'the original text'. Do you have a copy of d'Olivet's text in front of you. I suspect not, so you are presumably referring to the mentions in my articles.
I don't understand what you mean by circular argument in relation to 'potential existence'. What is the circle?
You also jump ahead to chapter 6, when so far I've only dealt with chapter 1. By this stage the human race has been created; there have after all been four intervening chapters. Potential existence refers only to chapter 1.