Epistemic uncertainty—the idea that traditional sources of knowledge cannot be trusted—has long been exploited by disingenuous medical gurus to attract patients. Their techniques mirror those that Trump brought to the broader public: Earn sympathy by identifying genuine problems..... But instead of proposing nuanced fixes—as an honest person would—exploiters of epistemic uncertainty turn these legitimate critiques into crude rhetorical bombs that allow them to attack the entire system.

Source: 

http://www.slate.com/articles/health_and_science/cover_story/2017/01/trump_sold_america_a_miracle_cure_it_will_fail_he_ll_get_off_for_free.html