That's fine- whether or not their question is disingenuous, it's almost always a reasonable question that has been asked and answered by researchers, or that ha

That's fine- whether or not their question is disingenuous, it's almost always a reasonable question that has been asked and answered by researchers, or that has been asked and not been able to be answered (e.g. what are the long term effects of mRNA vaccines?). It's perfectly fine to say, "we don't know what are the long term effects of mRNA vaccines but we can guess they're unlikely to be worse than the long term effects of the thing they're vaccinating against, which you're almost certain to catch sooner or later".