particularly the "critical thinking" stuff they always talk about.
But starting with math. If a mask reduces infection rates by both 50% for the sender and receiver* then the odds of an additional infection are reduced 75%. Should infection occur anyway, the odds for the next infection would by 6.25% as a function of the initial interaction, and so forth. That is a simplified example- avoiding high risk situations etc. are important too.
Although you can simply short circuit that by going to the internet and find some confirmation bias material that says that is bunk. That's true of AGW, whether the moon landing was fake or if pro rasslin' is actually an athletic contest. And, pull out some anecdata about someone you knew who was 90 and recovered, or someone who just had some mild symptoms- all of which are well within the range of expected outcomes.
Or you can just go all legal and contend that the Constititution says you don't have to do nuthin'. Which might or might not be true (seat belts, etc.) but doesn't mean you maybe shouldn't just to show how masculine you wish you were.
*hypothetical. In reality probably a bit less for the receiver, a bit more from the sender.
