Full Idea
Aristotle thinks that in general we have knowledge or understanding when we grasp causes, and he distinguishes three fundamental types of knowledge - theoretical, practical and productive.
Gist of Idea
For Aristotle, knowledge is of causes, and is theoretical, practical or productive
Source
report of Aristotle (works [c.330 BCE]) by Alan D. Code - Aristotle
Book Reference
'Encyclopedia of Classical Philosophy', ed/tr. Zeyl,Donald J. [Fitzroy Dearborn 1997], p.71
A Reaction
Productive knowledge we tend to label as 'knowing how'. The centrality of causes for knowledge would get Aristotle nowadays labelled as a 'naturalist'. It is hard to disagree with his three types, though they may overlap.