The Pascalian Heart in the Online Echo Chamber

Abstract Many people form beliefs about matters of social and political importance online, in what have been described as “echo chambers.” These include social media news feeds and news sites tailored to the consumer’s political perspective. Some philosophers have suggested that there is nothing especially worrying about this from an epistemological view, while others have taken it to be a serious problem in need of diagnosis and remedy. This chapter applies some ideas of the 17th-century philosopher Blaise Pascal to the dispute about echo chambers. Pascal emphasized the role of affect, or what he called “the heart,” in determining belief. The ways in which the heart can affect belief are characterized as motivated reasoning and motivated seeing—the influence of affective states on the processing of evidence and the appearance of evidence, respectively. These influences and their manifestation in online echo chambers are discussed, and the consequences for one’s rationality assessed. A Pascalian perspective that emphasizes the heart, rather than focusing exclusively on reasoning, has great potential to explain and diagnose the problem with online echo chambers, and thereby shed light on a major issue in applied epistemology.