David: The problem is you want your intelligent cells to communicate at an intellectual level that does not exist. Cells communicate throught biochecical reactions as bbella's lecture shows. A appears, affects B, which initiates C, which starts up D, which reacts with the originator of A to complete the feedback loop. Intelligent planning for the loop, nothing invented by the cells-Please read the Nobel release carefully describing cellular activity as highly organized reactions under genetic control. No thought needed;-http://www.nobelprize.org/nobel_prizes/medicine/laureates/2013/press.html