In his 1995 book The Demon-Haunted World: Science as a Candle in the Dark, astrophysicist Carl Sagan explains the scientific method and encourages non-scientists to think skeptically and critically about science and pseudo-science (in Dr. Sagan’s telling, pseudo-science includes topics such as ghosts, psychic abilities, and witchcraft). He laments the failure of our institutions to educate the populace to distinguish fact from fiction, and explains how the scientific method is not a belief system, but rather a tool for discovering the truth.
I can’t say that I am 100% onboard with Dr. Sagan’s theses, as I feel he leaves too little room for subjective human experiences, whether those are religious revelations or more esoteric phenomena, such as alien abductions and bigfoot sightings. However, as a basis for policy-making in the real world, unverifiable subjective experiences–or claiming one’s own “truth” regardless of the facts–can be downright dangerous.
Exhibit A in that regard is the Trump campaign, which is largely untethered from anything close to reality. The “demons” that haunt Mr. Trump’s world are not abstract pseudo-scientific concepts. Rather, they are flesh and blood human beings, who are routinely lied about and scapegoated, and who are suffering real harm as a result.