We are all purposive

Strategies and their functional apparatus exist for a purpose, they are algorithmic structures, they enable choice making by providing a range of optional responses to stimuli.  These tactical responses are probative and expectant.  They enable comparative analysis, relating expectations to feedback, assigning relevant meaning to the data accordingly. They allow for storage of results and continued analysis of data from the feedback loop, adjusting the relevance of the stored results accordingly.  In short, they allow for learning.  They form the structures of biological intelligence.