Library:The Demon-Haunted World
| The Demon-Haunted World: Science as a Candle in the Dark | |
|---|---|
| Author | Carl Sagan |
| First published | 1995 |
| ISBN | 978-0-345-40946-1 |
| Role | Analysis |
| Domains | Science & Environment Health & Medicine |
| Tactics | Pseudoscience / Junk Science |
The Demon-Haunted World: Science as a Candle in the Dark is a 1995 book by Carl Sagan.
Summary
Carl Sagan, the astronomer and broadcaster best known for Cosmos, wrote this book with his collaborator and wife Ann Druyan near the end of his life; it was published in 1995, about a year before his death. It is a defence of scientific thinking as a public necessity, not just a professional method, and it remains one of the most widely read arguments for skepticism ever written for a general audience.
The baloney detection kit
The book's best-known chapter offers a "baloney detection kit": a set of tools for thinking through claims. They include seeking independent confirmation of the facts, encouraging debate among knowledgeable people, remembering that arguments from authority carry little weight, considering more than one hypothesis, quantifying where possible, checking that every link in a chain of argument works, preferring the simpler explanation, and asking whether a claim can, even in principle, be falsified. Sagan pairs the kit with a list of common logical fallacies, from ad hominem attacks to special pleading and false dichotomy.
The dragon in the garage
In a celebrated parable, someone claims to keep an invisible, heatless, incorporeal dragon in their garage. Every proposed test is met with a new reason it cannot work. The point is that a claim which explains away every possible test is not a bold claim but an empty one. The parable remains one of the clearest explanations of unfalsifiability.
Cases
Sagan examines alien abduction reports, the so-called Face on Mars, faith healing, channelling and the witch persecutions of early modern Europe, arguing that the same mental habits connect them. He treats these cases with sympathy for the people involved and severity toward the reasoning.
The warning
The book is also a political argument. Sagan worried about a future in which a population unable to evaluate scientific claims would be unable to hold its leaders to account, and would slide back into superstition without noticing. He links scientific literacy to democratic self-government, drawing on Frederick Douglass's account of how learning to read was the path out of slavery. Many readers now cite this warning as prophetic.
Relevance to Bullshitopedia
The baloney detection kit is a ready-made editorial standard, and the book's core argument is the civic case for a site like this: a public that cannot tell evidence from assertion cannot govern itself.