This compelling reevaluation of the relationship between logic and knowledge affirms the key role that the notion of judgement must play in such a review. The commentary repatriates the concept of judgement in the discussion, banished in recent times by the logical positivism of Wittgenstein, Hilbert and Schlick, and the Platonism of Bolzano. The volume commences with the insights of Swedish philosopher Per Martin-Löf, the father of constructive type theory, for whom logic is a demonstrative science in which judgement is (...) a settled feature of the landscape. His paper opens the first of four sections that examine, in turn, historical philosophical assessments of judgement and reason; their place in early modern philosophy; the notion of judgement and logical theory in Wolff, Kant and Neo-Kantians like Windelband; their development in the Husserlian phenomenological paradigm; and the work of Bolzano, Russell and Frege. The papers, whose authors include Per Martin-Löf, Göran Sundholm, Michael Della Rocca and Robin Rollinger, represent a finely judged editorial selection highlighting work on philosophers exercised by the question of whether or not an epistemic notion of judgement has a role to play in logic. The volume will be of profound interest to students and academicians for its application of historical developments in philosophy to the solution of vexatious contemporary issues in the foundation of logic. ​. (shrink)

The principle of sufficient reason can be taken as a guide to the progress of philosophical and scientific knowledge. Thus, we could establish a link between scientific disciplines and philosophy, which would result in a mutually enriching dialogue. However, it can be shown that the use of the principle of sufficient reason is not suitable for the philosophical and scientific research, so neither can be used to establish a dialogue. It is argued, therefore, that other principles must be deepened, e.g., (...) causality, to establish a link between science and philosophy. (shrink)

I defend a new reading of Spinoza's account of causation that reconciles the strengths of the mechanist and formal cause interpretations by locating instances of nature's fixed and unchanging laws inside individual natures; natures are efficacious because that's where the laws are. God's necessity, for instance, follows from certain logical principles contained within God's nature. Causes between finite particulars likewise stem entirely from finite natures. They do so, I argue, because finite instances of nature's fixed and unchanging laws are inscribed (...) within those natures. In each of these instances, effects follow from natures on account of laws contained within them. (shrink)

Does Spinoza present philosophy as the preserve of an elite, while condemning the uneducated to a false though palliative form of ‘true religion’? Some commentators have thought so, but this contribution aims to show that they are mistaken. The form of religious life that Spinoza recommends creates the political and epistemological conditions for a gradual transition to philosophical understanding, so that true religion and philosophy are in practice inseparable.

According to the unrestricted version of the Principle of Sufficient Reason (PSR), every truth has an explanation. I argue that there is defeasible methodological justification for belief in an unrestricted PSR. The argument is based on considerations about our cognitive limitations. It is possible that our cognitive limitations prevent us from even recognizing the explanatorily open character of some propositions we can now represent: the fact that these propositions are explicable in the first place. If this is the case, then (...) a proper recognition of our limitations and a standing goal of reasoning to attain complete explanatory knowledge justify the adoption of an unrestricted PSR. (shrink)

Spinoza's response to a certain radical form of scepticism has deep and surprising roots in his rationalist metaphysics. I argue that Spinoza's commitment to the Principle of Sufficient Reason leads to his naturalistic rejection of certain sharp, inexplicable bifurcations in reality such as the bifurcations that a Cartesian system posits between mind and body and between will and intellect. I show how Spinoza identies and rejects a similar bifurcation between the representational character of ideas or mental states and the epistemic (...) status of these ideas, a bifurcation to which Spinoza sees the radical sceptic committed. Spinoza's rejection of this bifurcation helps to explain some of his most cryptic statements concerning scepticism and also reveals a promising and highly metaphysical strategy for understanding and responding to scepticism. (shrink)

The Principle of Sufficient Reason is a powerful and controversial philosophical principle stipulating that everything must have a reason or cause. This simple demand for thoroughgoing intelligibility yields some of the boldest and most challenging theses in the history of metaphysics and epistemology. In this entry we begin with explaining the Principle, and then turn to the history of the debates around it. A section on recent discussions of the Principle will be added in the near future.