Cultural and social aspects of task function

Another intriguing post from Joshua Porter:

In his book The Evolution of Useful Things, Henry Petroski challenges the widely-held notion that “form follows function”. Using the example of knives and forks vs. chopsticks, Petroski shows how the development of eating tools was as much the result of cultural and social issues as about the task itself. Investigating how Eastern and Western cultures have evolved completely different designs that do essentially the same task (conveying food to mouth), Petroski asserts that the difference is crucial.

Ah, but perhaps the question of whether form follows function or not all depends on how narrowly or broadly one defines the function of a “task”? If the task’s function is to convey food to mouth in a way that satisfies cultural and social mores, then the form of the implement—chopstick, fork etc.—exactly follows function. I vote for the application of Occam's Razor here!