Yes, purpose is another word for the fundamental symmetry of neural computation identified here from Mendaciology and human natural language studies of brain computation. It only takes two naturally living neurons to exhibit purposeful computation (possibly just one). By the symmetry, it is ordained by the fundamental symmetry of all neural computation.

https://medium.com/liecatcher/100-billion-sources-of-hate-between-your-ears-d34baf503c98