Circular arguments fail to usefully constrain our beliefs; any assumptions we managed to justify based on evidence of EV will assign negative EV for circular arguments, and so there is no available source of justification from existing beliefs for adopting a circular argument, while there is for rejecting them.
As mentioned in AnthonyC’s comment, circular arguments do constrain beliefs: they show that everything in the circle comes as a package deal. Any point in the circle implies the whole.
Multiple argument chains without repetition can demonstrate anything a circular argument can. No beliefs are constrained when a circular argument is considered relative to the form disallowing repetition (which could avoid costly epicycles). The initial givens imply the conclusion, and they carry through to every point in the argument, implying the whole.
As mentioned in AnthonyC’s comment, circular arguments do constrain beliefs: they show that everything in the circle comes as a package deal. Any point in the circle implies the whole.
Multiple argument chains without repetition can demonstrate anything a circular argument can. No beliefs are constrained when a circular argument is considered relative to the form disallowing repetition (which could avoid costly epicycles). The initial givens imply the conclusion, and they carry through to every point in the argument, implying the whole.