In his response to the pantheism controversy, Kant drew an analogy between prudent thinking without objective ground and spatial orientation. The implication is that thinking is amenable to be modeled on spatial perception.

Much later, the time-space sociologist Bernd Schmeikal (1993) argued that Boolean algebra may have been discovered and taught by people turning round stones divided in four sections during Paleolithic worship.

Curiously, the shape of Schmeikal’s stones is reflected by the basic anatomy of the bilateral body, which – as we know – faces in a determinate direction. Facing in a direction is the basis for orientation for beings such as us and also the context in which our thinking has evolved.

The apparent homeomorphism between anatomy and the rules of thinking as we know them leaves a range of questions, some of which may be worth pursuing. For example, if we grant the homeomorphism, which sort of body might support the highest degree of freedom of thought? The answer is obvious. To maximize liberty in nature, humans need to pursue a new, spherical form.