471. VIII. THAT THE WEIGHTY CAUSES OF THIS CONCUBINAGE ARE REAL AND UNREAL. In addition to just causes, which are just causes of separation and so become just causes of concubinage, there are also weighty causes which depend on the judgment and justice of the man. These must therefore be mentioned; but since the judgments of justice may be perverted and by confirmations be turned into appearances of justice, these causes are distinguished into real and unreal weighty causes, and are described separately.