Ayers wrote, "An argument for deep contingency is based on the simple principle that the best explanation reckons with the most information. Simple explanations that ignore complication in an impatient determination to get to the bottom line or root cause are worse than useless. They give the false impression that we have explained something when we have not."
In other words, if you substitute "over-determination" for "deep contingency", you come up with the same thought. Hope that clears up my muddier prior comment. :)