Although the everyday notion of information has clear semantic properties, the all-pervasive technical concept of Shannon information was defended being a non-semantic concept. In this paper I will show how this measure of information was implicitly ‘semantized’ in the early 1950s by many authors, such as Rothstein's or Brillouin's, in order to explain the knowledge dynamics underlying certain scientific practices such as measurement. On the other hand, I will argue that the main attempts in the literature to develop a quantitative measure of semantic information to clarify science and scientific measurements, such as Carnap-Bar-Hillel, or Dretske, will not successfully achieve this philosophical aim for several reasons. Finally, I will defend the use of a qualitative notion of semantic information within the information-theoretical framework MacKay to assess the informational dynamics underlying scientific practices, particularly measurements in statistical mechanics.

Many authors have argued that epistemic rationality sometimes comes into conflict with our relationships. Although Sarah Stroud and Simon Keller argue that friendships sometimes require bad epistemic agency, their proposals do not go far enough. I argue here for a more radical claim—romantic love sometimes requires we form beliefs that are false. Lovers stand in a special position with one another; they owe things to one another that they do not owe to others. Such demands hold for beliefs as well. Two facets of love ground what I call the false belief requirement , or the demand to form false beliefs when it is for the good of the beloved: the demand to love for the right reasons and the demand to refrain from doxastic wronging. Since truth is indispensable to epistemic rationality, the requirement to believe falsely, consequently, undermines truth norms. I demonstrate that, when the false belief requirement obtains, there is an irreconcilable conflict between love and truth norms of epistemic rationality: we must forsake one, at least at the time, for the other.

Methodological naturalists regard scientific method as the only effective way of acquiring knowledge. Quite the contrary, traditional analytic philosophers reject employing scientific method in philosophy as illegitimate unless it is justified by the traditional methods. One of their attacks on methodological naturalism is the objection that it is either incoherent or viciously circular: any argument that may be offered for methodological naturalism either employs a priori methods or involves a vicious circle that ensues from employing the very method that the argument is aimed to show its credentials. The charge of circularity has also been brought against the naturalistic arguments for specific scientific methods; like the inductive argument for induction and the abductive argument for the inference to the best explanation. In this paper, I respond to the charge of circularity using a meta-methodological rule that I call ‘reflexivity requirement.’ Giving two examples of philosophical works, I illustrate how the requirement has already been considered to be necessary for self-referential theories. At the end, I put forward a meta-philosophical explanation of the naturalism-traditionalism debate over the legitimate method of philosophy.

Two Gettier cases are described in detail and it is shown how they unfold in terms of reflective and reflexive desiderata. It is argued that the Gettier problem does not pose a problem for conceptions of knowledge as long as we are consistent in how we understand justification and knowledge. It is only by reading the cases with a reflective understanding of justification but a reflexive understanding of knowledge, without acknowledging that this takes place, that the cases become ‘problems.’

Epistemic Contextualism is generally treated as a semantic thesis that may or may not have epistemological consequences. It is sometimes taken to concern only knowledge claims (as the assertion that the word “know” means different things in different contexts of use). Still, at other times it is taken to regard the knowledge relation itself (as the assertion that knowledge itself has no single univocal nature). Call the former view Semantic EC, the latter view Substantive EC, and the idea that the plausibility of Semantic EC presupposes that of Substantive EC, the “Presupposition Thesis.” Numerous authors argue against the Presupposition Thesis on the grounds that an understanding of the nature of knowledge is no more required to understand the meaning of knowledge assertions than an understanding of the self, for instance, is needed to understand the meaning of sentences containing “I.” These authors then offer additional arguments for the same conclusion, using further comparisons between “know” and other indexicals, as well as between “know” and quantifiers, gradable and modal adjectives. Herein, I defend the Presupposition Thesis by arguing against these authors’ claims (based as they are on these types of comparisons) that Semantic EC is plausible without the supposition of Substantive EC.

Francesco Praolini has recently put pressure on the view that justified believability is closed under conjunction introduction. Based on what he calls ‘the hybrid paradox,’ he argues that accepting the principle of conjunction closure for justified believability, quite surprisingly, entails that one must also accept the principle of factivity for justified believability, i.e. that there are no propositions that are justifiably believable and false at the same time. But proponents of conjunction closure can do without factivity, as I argue in this short note. A less demanding principle is available.