I’ve reached the conclusion that thinking and digesting have very much in common.

Citarum 2

We can’t do it by our own. Those of us who don’t cooperate/speak with those around them, don’t have what to eat or what to think about.

Both processes imply three stages. Identification, absorption, use.
We use cultural models to identify both our food and the important issues.
Absorption – through our gut/conscience, is both highly specific to each individual and governed by our common DNA/shared cultural traditions.
The ‘products’ of the digesting/thinking process are, again, used both in public as well as in private. Part of the energy we get from our food is consumed ‘cooperatively’ with our ‘coworkers’ while most of our thoughts end up either verbally expressed or put in practice.

Both processes, digesting as well as thinking, increasingly change the environment where we, and others, live.

Citarum 1