:Dear ;  
 :*This is the first time you talk about the BBC. 
 :*The loop does not show the "Check and Balance" system. It shows tendency of closed loop system toward its extremums. It actually checks but unballances the system toward a specific political party. 
 :*Remember that all other sections of the article refers to Iranian constitution and use it as reference. I am wondering how it is not allowed to use Iranian Constitution as a reference to show its own problems while at the same time other references are used. 
 :*I am happy to see that you confirms the existance of a circle and only are discussing about terminology. 
 :*Now see the following Persian links which belongs to one of the political parties inside Iran. You can see that the section "vicious circle" is not OR. http://www.mojahedin-enghelab.org/ShowItem.aspx?ID=52&p;=1   http://www.mojahedin-enghelab.org/ShowItem.aspx?ID=54&p;=1  I will add some other links if you would like.