Symmetry and Symmetry Breaking

Posted on by Simon Fokt

Introduction: Symmetry considerations dominate modern fundamental physics, both in quantum theory and in relativity. Philosophers are now beginning to devote increasing attention to such issues as the significance of gauge symmetry, quantum particle identity in the light of permutation symmetry, how to make sense of parity violation, the role of symmetry breaking, the empirical status of symmetry principles, and so forth. These issues relate directly to traditional problems in the philosophy of science, including the status of the laws of nature, the relationships between mathematics, physical theory, and the world, and the extent to which mathematics suggests new physics.

This entry begins with a brief description of the historical roots and emergence of the concept of symmetry that is at work in modern science. It then turns to the application of this concept to physics, distinguishing between two different uses of symmetry: symmetry principles versus symmetry arguments. It mentions the different varieties of physical symmetries, outlining the ways in which they were introduced into physics. Then, stepping back from the details of the various symmetries, it makes some remarks of a general nature concerning the status and significance of symmetries in physics.

Understanding and The Facts

Posted on by Simon Fokt

Abstract: If understanding is factive, the propositions that express an understanding are true. I argue that a factive conception of understanding is unduly restrictive. It neither reflects our practices in ascribing understanding nor does justice to contemporary science. For science uses idealizations and models that do not to mirror the facts. Strictly speaking, they are false. By appeal to exemplification, I devise a more generous, flexible conception of understanding that accommodates science, reflects our practices, and shows a sufficient but not slavish sensitivity to the facts.

Creating Scientific Concepts

Posted on by Simon Fokt

Publisher’s Note: How do novel scientific concepts arise? In Creating Scientific Concepts, Nancy Nersessian seeks to answer this central but virtually unasked question in the problem of conceptual change. She argues that the popular image of novel concepts and profound insight bursting forth in a blinding flash of inspiration is mistaken. Instead, novel concepts are shown to arise out of the interplay of three factors: an attempt to solve specific problems; the use of conceptual, analytical, and material resources provided by the cognitive-social-cultural context of the problem; and dynamic processes of reasoning that extend ordinary cognition. Focusing on the third factor, Nersessian draws on cognitive science research and historical accounts of scientific practices to show how scientific and ordinary cognition lie on a continuum, and how problem-solving practices in one illuminate practices in the other.

Distinguishing Explanatory from Nonexplanatory Fictions

Posted on by Simon Fokt

Abstract: There is a growing recognition that fictions have a number of legitimate functions in science, even when it comes to scientific explanation. However, the question then arises, what distinguishes an explanatory fiction from a nonexplanatory one? Here I examine two cases – one in which there is a consensus in the scientific community that the fiction is explanatory and another in which the fiction is not explanatory. I shall show how my account of “model explanations” is able to explain this asymmetry, and argue that realism – of a more subtle form – does have a role in distinguishing explanatory from nonexplanatory fictions.

Taking Responsibility for our Emotions

Posted on by Simon Fokt

Abstract: We often hold people morally responsible for their emotions. We praise individuals for their compassion, think less of them for their ingratitude or hatred, reproach self-righteousness and unjust anger. In the cases I have in mind, the ascriptions of responsibility are not simply for offensive behaviors or actions which may accompany the emotions, but for the emotions themselves as motives or states of mind. We praise and blame people for what they feel and not just for how they act. In cases where people may subtly mask their hatred or ingratitude through more kindly actions, we still may find fault with the attitude we see leaking through the disguise.

Subject­-Sensitive Invariantism and the Knowledge Norm for Practical Reasoning

Posted on by Simon Fokt

Introduction: It is increasingly popular to suggest that knowledge is the norm of practical reasoning, or reasoning about what to do (e.g. Hawthorne 2004, Stanley 2005). This idea is central to the defence of a new version of invariantism – ‘subject-sensitive invariantism’ – on which whether the true belief that p is knowledge not only depends on such factors as one’s evidence, and the reliability of the belief-producing process, but also the stakes or how important it is that p be true (the view is also known as ‘sensitive moderate invariantism’ (Hawthorne 2004) and ‘interest relative invariantism’ (Stanley 2005)). I will argue against the idea that knowledge is the norm of practical reasoning, whether that is understood as a necessity or sufficiency claim. Instead, I will argue that the epistemic standards for practical reasoning vary contextually.

True Enough

Posted on by Simon Fokt

Abstract: Truth is standardly considered a requirement on epistemic acceptability. But science and philosophy deploy models, idealizations and thought experiments that prescind from truth to achieve other cognitive ends. I argue that such felicitous falsehoods function as cognitively useful fictions. They are cognitively useful because they exemplify and afford epistemic access to features they share with the relevant facts. They are falsehoods in that they diverge from the facts. Nonetheless, they are true enough to serve their epistemic purposes. Theories that contain them have testable consequences, hence are factually defeasible.

The Status of Consciousness in Nature

Posted on by Simon Fokt
Abstract: The most central metaphysical question about phenomenal consciousness is that of what constitutes phenomenal consciousness, whereas the most central epistemic question about consciousness is that of whether science can eventually provide an explanation of the phenomenon. Many philosophers have argued that science doesn’t have the means to answer the question of what consciousness is (the explanatory gap) but that consciousness nonetheless is fully determined by the physical facts underlying it (no ontological gap). Others have argued that the explanatory gap in the sciences entails an ontological gap. This position is also known as ‘property dualism’. Here I examine a fourth position, according to which there an ontological gap but no explanatory gap.

 

The Mental and The Physical

Posted on by Simon Fokt

Summary: In this paper the author addresses physicalism and the problem of whether physicalism can account for consciousness and intentionality of our mental states. After providing a good survey of problems posed by this phenomenon as well as possible physicalist responses, she concludes that there still is no satisfying explanation of how the nature of our mental states fits into an “otherwise physical world”.

Semantic Externalism and Psychological Externalism

Posted on by Simon Fokt

Abstract: Externalism is widely endorsed within contemporary philosophy of mind and language. Despite this, it is far from clear how the externalist thesis should be construed and, indeed, why we should accept it. In this entry I distinguish and examine three central types of externalism: what I call foundational externalism, externalist semantics, and psychological externalism. I suggest that the most plausible version of externalism is not in fact a very radical thesis and does not have any terribly interesting implications for philosophy of mind, whereas the more radical and interesting versions of externalism are quite difficult to support.