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Precis of Authority and Estrangement: An Essay on Self-Knowledge
Philosoph
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Problems of Sincerity
It is undeniable that the assumption of sincerity is important to assertion, and that assertion is central to the transmission of beliefs through human testimony. Discussions of testimony, however, often assume that the epistemic importance of sincerity to testimony is that of a (fallible) guarantee of access to the actual beliefs of the speaker. Other things being equal, we would do as well or better if we had some kind of unmediated access to the beliefs of the other person, without the risks involved in the overt act of speaking, and the assumption of sincerity in speech is the closest we can come to this access. Contrary to this picture, I argue that sincerity has a quite different epistemic role to play in testimony than that of an indicator of the speaker's beliefs. The epistemology of testimony requires reference to the speaker as agent, and not just the speaker's beliefs, as well as a sense of 'expression of belief that links it to the specifically addressive relation to another person.Philosoph
Microbial diversity in the thermal springs within Hot Springs National Park
The thermal water systems of Hot Springs National Park (HSNP) in Hot Springs, Arkansas exist in relative isolation from other North American thermal systems. The HSNP waters could therefore serve as a unique center of thermophilic microbial biodiversity. However, these springs remain largely unexplored using culture-independent next generation sequencing techniques to classify species of thermophilic organisms. Additionally, HSNP has been the focus of anthropogenic development, capping and diverting the springs for use in recreational bathhouse facilities. Human modification of these springs may have impacted the structure of these bacterial communities compared to springs left in a relative natural state. The goal of this study was to compare the community structure in two capped springs and two uncapped springs in HSNP, as well as broadly survey the microbial diversity of the springs. We used Illumina 16S rRNA sequencing of water samples from each spring, the QIIME workflow for sequence analysis, and generated measures of genera and phyla richness, diversity, and evenness. In total, over 700 genera were detected and most individual samples had more than 100 genera. There were also several uncharacterized sequences that could not be placed in known taxa, indicating the sampled springs contain undescribed bacteria. There was great variation both between sites and within samples, so no significant differences were detected in community structure between sites. Our results suggest that these springs, regardless of their human modification, contain a considerable amount of biodiversity, some of it potentially unique to the study site
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