It depends upon where I have read or heard the item. If it is something posted on FB, claiming that someone's auntie's sister's cleaner knows someone who cuts the lawn for a research scientist and he told her that covid19 is all a conspiracy......then I usually disregard it due to the source. I have friends who post this rubbish and make themselves look rather silly in consequence. Anything political, I check the political slant of the author or publication, as we all know, one event can be very different from two interpretations. On a personal basis, I assume that the people I like, socialise with, are honest and truthful.