Fred: I don’t know. It’s a bit of local culture.
Therefore a gumboot IS a cultural artifact.
wh5 = who, what, where, when and why. The five basic questions that are the structure of any story. Explored in "Who says what, where, when and and Why: Context in Conversation." An introduction to Sociolinguistics through Conversation Analysis. wh5 is the blogsite of the book published 2008 by Nanundo-Phoenix, Tokyo.