New Challenge Question

In response to several requests, after the prior Challenge Question lounged with little or no response for more than 4 months, a new Challenge Question has been posted. It will remain “open” for approximately 4-6 weeks and then one of two things will occur — either there are responses and the best correct answer is announced or the question will elicit no responses and it will be officially answered, followed by the experiment being ended due to lack of interest. Your choice.