With the help of the formal structure of Bayesianism, I distinguish between two different ways in which one’s testimony can be undervalued. While the modelling in the existing literature only focuses on the undervaluation of the trustworthiness of the testimony, the undervaluation of the relevance of the testimony has not been given due attention. The undervaluation of relevance cannot be modelled with Jeffrey conditionalisation as it is traditionally practised. But it can be modelled with Adams…
Read moreWith the help of the formal structure of Bayesianism, I distinguish between two different ways in which one’s testimony can be undervalued. While the modelling in the existing literature only focuses on the undervaluation of the trustworthiness of the testimony, the undervaluation of the relevance of the testimony has not been given due attention. The undervaluation of relevance cannot be modelled with Jeffrey conditionalisation as it is traditionally practised. But it can be modelled with Adams conditionalisation or Jeffrey conditionalisation if applied to the right partition. Distinguishing between the two conceptions of testimonial undervaluation opens the possibility that a person can be subject to double testimonial undervaluation or both testimonial undervaluation and testimonial overvaluation because of the same social identity.
