Alonzo Fyfe
Listening to one of the Triad of Reason podcasts one of the guests, Alonzo Fyfe was talking about his theory of Desire Utilitarianism. Not bad, all said, in that it seeks to describe how people actually judge things, not how they should judge things. Thus it isn’t trying to find normative truth which is good since in my book, thus far at least, is an oxymoron. Hopefully some day I’ll straighten that one out in my head. 
In his discussion he brings up what, in terms of his theories, is a vicious circle, or a small circle of reasoning. His example is fantastic:
“God exists.”
“How do you know?”
“Because the Bible says so.”
“Why trust the bible?”
“Because God wrote it. ”
I agree that in complex descriptive systems things will indeed weigh upon each other. Look at a dictionary. Words are defined in terms of other words. This doesn’t mean that there is anything wrong wih it, but just demonstrates that at some level your descriptions will weigh upon each other as though in a web. The problem becomes when you let the web get too small as in the above example.
I’ll definitely have to read up more on his stuff.
“But first his initial definition: desire is the motivation to make a proposition true.” Hmmm…