(no subject)

Technical artifacts, then, are made to serve some purpose... Whether end product or component, an artifact is ‘for something’, and what it is for is called the artifact’s function.
https://plato.stanford.edu/entries/technology/

I'm confused. Does the word "function" here represent a function as an arrow in CT, or is it just another word for "purpose" and it stands for something else? For example, a shoe has the purpose to protect my foot, etc. Therefore, can I say that it maps a bare foot to a protected foot?

shoe: bare foot -> equipped foot

Tai Chi Chuan journal #6

In the negative positive circle, the elbow should face the ground on the way out.