> I don't think I've ever done it. I have, once. Or at least I came close. The lady had two arguments: vaccines, like most medicine, make our immune system wea

> I don't think I've ever done it. I have, once. Or at least I came close. The lady had two arguments: vaccines, like most medicine, make our immune system weaker; and "they" put poisonous stuff in vaccines. I pointed out that (i) vaccines aren't a crutch that may relieve or replace our immune system, but a kind of kick in the butt designed to strengthen our immune system, and (ii) that yes, they put poison in it, because that's how we can ensure our body reacts to it and prepares itself for the real thing. That was enough to cause her to reconsider her conspiracy thinking. I think one key here was to acknowledge one of her arguments (the poison thing). I also did not discuss regular drugs, so I could focus on vaccines. I did not deny drugs makes our immune system weaker, even though I don't think they do in most cases. Turned out listening can be a rhetoric weapon as well as a learning tool.