Scott Alexander introduces the 'North Dakota Constant' to explain why about 33% of people tend to believe in conspiracy theories in surveys, regardless of evidence. Longer summary

Scott Alexander discusses the prevalence of belief in conspiracy theories, introducing the concept of a 'North Dakota Constant' of about 33% - the percentage of people who will believe in a conspiracy theory without any supporting evidence. He compares this to the previously established 'Lizardman Constant' of 4%. The post analyzes survey data on beliefs in various conspiracy theories, including Pizzagate and Obama's birthplace, arguing that the seemingly high percentages of belief might be more reflective of this constant rather than actual widespread acceptance of these theories. Scott suggests that factors like the absence of 'don't know' options in surveys, low-information voters, and pre-existing biases might contribute to these results. He concludes that we should be cautious about drawing strong conclusions from such survey data, especially when the percentage of believers is close to 33%. Shorter summary