The Demon-Haunted World

hail sagan

The ‘Demon-Haunted World: Science as a Candle in the Dark’ is a book by astrophysicist Carl Sagan, which was first published in 1995. The book is intended to explain the scientific method to laypeople, and to encourage people to learn critical or skeptical thinking. It explains methods to help distinguish between ideas that are considered valid science, and ideas that can be considered pseudoscience. Sagan states that when new ideas are offered for consideration, they should be tested by means of skeptical thinking, and should stand up to rigorous questioning.

In the book, Sagan states that if a new idea continues in existence after an examination of the propositions has revealed it to be false, it should then be acknowledged as a supposition. Skeptical thinking essentially is a means to construct, understand, reason, and recognize valid and invalid arguments. Wherever possible, there must be independent validation of the concepts whose truth should be proved. He states that reason and logic would succeed once the truth is known. Conclusions emerge from premises, and the acceptability of the premises should not be discounted or accepted because of bias.

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