My response was essentially, "I can do it, but we will need to explain why we are going against CDC guidelines or else I see a mass problem on our hands. Can you get that reasoning for me so I can share it?"
A few hours later, the request for the memo was rescinded. Big win in my book.
I tell them to experiment with the fart test.
Put on your mask as tight as possible, then have someone fart in their face. If they can smell it, they can get covid.