Speaking generally, to know rationally (wissen) means to have in the power of the mind, and capable of being reproduced at will, such judgments as have their sufficient ground of knowledge in something outside themselves, i.e., are true.
Jakiteak oro har esan nahi du: halako judizioak bere espirituaren esku hautaz birsortzeko edukitzea, zeinek beren baitatik kanpora beste zerbaitetan beren behar besteko ezagutza-arrazoia baitute, h. d. egiazkoak baitira.