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PROPOSITION III.
THE LAW OF ALL IGNORANCE.
We can be ignorant only of what can possibly be known; in other words, there can be an ignorance only of that of which there can be a knowledge.
DEMONSTRATION.
If we could be ignorant of what could not possibly be known by any intelligence, all ignorance would not be possibly remediable. The knowledge in which we were deficient could not be possessed by any intelligence. But all ignorance is possibly remediable (by Prop. II.) Therefore, we can be ignorant only of what can possibly be known; in other words, there can be an ignorance only of that of which there can be a knowledge.
OBSERVATIONS AND EXPLANATIONS.
1. This is the most important proposition in the agnoiology: indeed, with the exception of the first
