Both in our memory (individual and cultural) and mechanically (biological and technological).
Just as it takes more effort to recall more details in the mind, so too does the natural work towards greater simplicity in its mechanisms.
Darwinism favours the energy efficient design and superfluous constructions are refined out along the way.
The mind and memory too prefer simplified versions of concepts - abstracts, interactions, even story - and will work to simplify the mind's understanding (and recall) of these things to more cost efficient, more simple models of the original.