Rhet gre 1397a10(10) οἷον ὅτι τὸ σωφρονεῖν ἀγαθόν· τὸ γὰρ ἀκολασταίνειν βλαβερόν.
Rhys Roberts 1924 engObserve whether that opposite has the opposite quality. If it has not, you refute the original proposition; if it has, you establish it.
http://www2.hf.uio.no/common/apps/permlink/permlink.php?app=polyglotta&context=record&uid=cf992691-1d51-11e7-ba66-0050569f23b2
