If a loss happen through the ignorance of the master of a ship, it is not considered as a peril of the sea; consequently the assurers are not liable. Nor is his ignorance of admiralty-law admissible as an excuse.
·noun A willful neglect or refusal to acquire knowledge which one may acquire and it is his duty to ...
Webster's Dictionary of the English Language
·noun Ignorance of one's own character, powers, and limitations. ...