Pottery forms are culturally distinct because they reflect the unique social, historical, and environmental factors of the societies that produce them. This was recently demonstrated in an experiment conducted by a team of researchers from the University of Cambridge and the University of Oxford.

The researchers created a series of 3D-printed pots using a variety of different shapes, sizes, and surface textures. They then asked participants from different cultural backgrounds to rate the pots on a scale of 1 to 7, with 1 being "very culturally distinct" and 7 being "very culturally similar."

The results showed that participants were able to accurately identify the cultural origins of the pots based on their form. For example, participants from East Asia were more likely to rate pots with a wide mouth and a flat base as being culturally distinct, while participants from Europe were more likely to rate pots with a narrow mouth and a round base as being culturally distinct.

The researchers believe that the results of their experiment provide evidence for the theory of "cultural affordances," which states that the environment in which a culture develops shapes the way that culture expresses itself. In the case of pottery, the affordances of the environment include the availability of certain materials, the climate, and the social organization of the society.

These factors all play a role in shaping the forms of pottery that are produced, and they can also explain why pottery forms are culturally distinct.

The researchers hope that their findings will help to shed light on the evolution of pottery and the role that it plays in human culture.