Jeonggyu Lee

It is widely accepted among philosophers that there is a tension between acquaintance constraints on singular thought and the plausible assumption that the truths of singular attitude reports ensure the subject's having singular thoughts. From this, anti-acquaintance theorists contend that acquaintance constraints must be rejected. As a response, many acquaintance theorists maintain that there is good reason to doubt a strong connection between singular attitude reports and singular thoughts. In this paper, however, I defend the acquaintance theory by arguing that there is in fact no tension at all. I consider three objections regarding singular attitude reports against the acquaintance theory: (i) ultra-liberal singular attitude reports, (ii) the “There is something that S believes to be F” locution, and (iii) infelicities of singular attitude reports. Then, I argue that none of them succeed in showing a genuine tension.

The primary aim of this paper is to provide the exact diagnosis of the contingent a priori debate so far by untangling complicated issues surrounding it, such as singular thought, linguistic stipulation, and epistemic justification. I will first maintain that most philosophers' arguments for or against the contingent a priori are ultimately based on one of two conflicting intuitions about linguistic stipulation: sceptics of the contingent a priori have appealed to the intuition that extra-linguistic knowledge cannot be acquired through the stroke of a pen, whereas proponents of it have appealed to the other intuition that one is in a position to understand a name that one introduces by oneself into one's own language. Then I will reconstruct the sceptics' and proponents' positions in their strongest form respectively and examine where they disagree, and finally I will argue that the contingent a priori debate cannot help but end in a stalemate without further scrutiny into singular thought. From this diagnosis, I conclude that in order to appropriately judge whether a contingent proposition is knowable a priori, we must first independently investigate what the conditions for singular thought are: the contingent a priori rides on the singular thought debate.