Tim Crane

Frege introduced the distinction between sense and reference to account for the information conveyed by identity statements. We can put the point like this: if the meaning of a term is exhausted by what it stands for, then how can 'a =a' and 'a =b' differ in meaning? Yet it seems they do, for someone who understands all the terms involved would not necessarily judge that a =b even though they judged that a =a. It seems that 'a =b' just says something more than the trivial ’a = a' - it seems to contain more information, in some sense of 'information'. So either we have to add something to explain this extra information, or sever the very plausible links between meaning and understanding. This is what some writers have called 'Frege's Puzzle' It is undeniable that there is a phenomenon here to be explained, and it was Frege's insight to see the need for its explanation. But how should we explain it? Frege's idea was to add another semantic notion - Sinn, or Sense -— to account for the information conveyed. Sense is part of the meaning of an expression: it is the 'cognitive value' of the expression, or that ’wherein the mode of presentation is contained' (Frege 1957 p.57). Sense has a role to play in systematically determining the meanings of complex expressions, and ultimately in fixing the contents of judgements. It is the senses of whole sentences — Gedanken or Thoughts - which are candidates for truth and falsehood, and which are thus the objects of our propositional attitudes. Of course, introducing the notion of sense in this way does not, by itself, tell us what sense is. It only imposes a condition on a theory of meaning (and ultimately) belief: that it must account for distinctions in cognitive value or 'mode of presentation' (this is not a trivial thesis —- some philosophers today would deny that an explanation of Frege's Puzzle must occur within semantics or the theory of meaning: see Salmon 1985). In this paper I want to explore one way of meeting this condition for the theory of names in natural language, by examining Kripke's well-known 'Puzzle about Belief' (Kripke 1979)..

Laurence BonJour divides approaches to a priori justification into three kinds. Quine’s radical empiricism denies the existence of any special category of a priori justification; moderate empiricism attempts to explain a priori justification in terms of something like knowledge of meaning or grasp of concepts; and rationalism postulates an irreducible ‘rational insight’ into the nature of reality. The positions therefore form a familiar trio of eliminativism, reductionism and anti-reductionism concerning a priori justification. BonJour’s interesting and (in the present philosophical climate) unusual project is to defend rationalism, the anti-reductionist position. Rationalism says that we have an ability to ‘directly or intuitively see or grasp or apprehend … a necessary fact about the nature or structure of reality’ (pp. 15-16). ‘An apparent rational insight,’ he says, ‘purports to be nothing less than a direct insight into the necessary character of reality’ (p. 107). Two clarifications will help to mark out the distinctive character of this view: first, that rational insight is fallible; and second, that although BonJour carefully distinguishes the concepts of necessity and apriority, he none the less claims that rational insight yields a priori knowledge of necessary truths only. On his view, the contingent a priori does not exist, although empirical necessities do...

Što je distinktivno filozofski problem opažanja? Ovdje se tvrdi da je to konflikt između prirode opažajnog iskustva kakva nam se intuitivno čini, te stanovitih mogućnosti koje su implicitne upravo u ideji iskustva: mogućnosti iluzije i halucinacije. Opažajno iskustvo čini nam se kao odnos prema svojim objektima, vrsta »otvorenosti prema svijetu« koja uključuje izravnu svijest postojećih objekata i njihovih svojstava. Ali ako netko može imati iskustvo iste vrste a da objekt nije tamo – halucinaciju objekta – onda izgleda da opažajno iskustvo ne može esencijalno biti takav odnos. Ovo je fundamentalni filozofski problem opažanja; različite filozofijske teorije opažanja 20. i 21. stoljeća mogu se sagledati kao odgovori na to.What is the distinctively philosophical problem of perception? Here it is argued that it is the conflictbetween the nature of perceptual experience as it intuitively seems to us, and certain possibilitieswhich are implicit in the very idea of experience: possibilities of illusion and hallucination. Perceptualexperience seems to us to be a relation to its objects, a kind of “openness to the world” whichinvolves direct awareness of existing objects and their properties. But if one can have an experienceof the same kind without the object being there – a hallucination of an object – then it seems thatperceptual experience cannot essentially be such a relation. This is the fundamentally philosophicalproblem of perception; the various philosophical theories of perception in the 20th and 21st centuriescan be seen as responses to it