This is an intuitive sense of knowledge that existed during the
medieval period, especially amongst ‘women of the town’.
Insights about similarities between elements of nature, and
commonsense insights about the way of the world are combined to
yield something that passes for wisdom. Unfortunately, during
later periods in history, much of this basic wisdom has been lost.
But one of the reasons is that it was not very universal. Its use
appeared (notoriously) to depend on the intelligence of the user,
and those who were not as bright frequently lost track of the  
(highly) 'original' meaning. At least as it came to be known, it had
little insight about the beginning of firearms, or how to cure

Four Types:

 Gestalt Examples: Leaves are like a tree, and so are you. The
world may be yellow or blue. Everything is a beach, everything is
a forest.

 Opposition Examples: The strange one is different. All things
separate for a time. Things come from the antipodes.

 Quantity Examples: When one has happened, so has the other.
The rule of the universal. Like to like. Things are often the same
when there’s more than one of the same --> Obviousness.

 Motion Examples: Who knows? It will come. Something will

 Kenning was largely replaced after the medieval period,
because of its reputation for superstition.