phrasecirculus in probandōCIRCVLVS IN PROBANDOcirculus in probandōClassical[ˈkɪr.kʊ.ɫʊs ˈɪn prɔˈban.doː]Ecclesiastical[ˈt͡ʃir.ku.lus ˈin proˈban.do]☆ KeepMeaningproving in circles, using a conclusion as the premise in an argument, thus going around the proof