something that is provable and can be verified (see Molina)
Alonso de Molina:
neltililoni. cosa prouable y que se puede verificar. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 66v. col. 2. Thanks to Joe Campbell for providing the transcription.