For the story to make its point, the narrator has to have clear and accurate knowledge of the elephant.

The system can provide accurate knowledge of the current inventory.

We can also have a kind of accurate knowledge called knowledge of the second kind, or reason.

We can not but record a mere fraction of his activities, and they are always carried out with good sense, good humour and accurate knowledge.

Latitude can be determined through celestial navigation; the measurement of longitude requires accurate knowledge of time.