Peter Cave gets to grips with maths, God and the meaning of life.

When consent to medical treatment is described as ‘valid’, it might simply mean that it has a sound basis, or it could mean that it is legally valid. Where the two meanings are regularly interchanged, however, it can lead to aspects of the sound basis or the legal requirements being neglected. This article looks at how the term is used in a range of guidance on consent to treatment and argues for consistency.

Consider manipulation in which one agent, avoiding force, threat, or fraud mobilizes some non-concern motive of another so as to induce this other to behave or move differently than she would otherwise have behaved or moved, given her circumstances and her initial ranking of concerns. As an instance, imagine that I get us to miss the opening of a play that I have grudgingly agreed to attend by engaging your sublimated compulsive tendency to check the stove when we are halfway (...) to the theatre. Such motive manipulation is, I take it, widely regarded as morally worrisome. If it really is morally worrisome, then we should be able to explain adequately why it is so. But existing condemnations of manipulation come up short in this regard. In this paper, I develop and defend a more plausible account of the moral status of this phenomenon. (shrink)

I defend mereological nihilism, the view that there are no composite objects, against a challenge from ontological emergence, the view that some things have properties that are ‘something over and above’ the properties of their parts. As the nihilist does not believe in composite wholes, there is nothing in the nihilist's ontology to instantiate emergent properties – or so the challenge goes. However, I argue that some simples can collectively instantiate an emergent property, so the nihilist's ontology can in fact (...) accommodate emergent properties. Furthermore, I show that employing plural instantiation does not bloat the nihilist's ontology or ideology. (shrink)

This is an accessible summary - online, The Well - 1st September 2023 - of concerns raised in my book 'The Myths We Live By' and my latest, 'How To Think Like a Philosopher: Scholars, Dreamers and Sages Who Can Teach Us How to Live'. -/- Herewith as PDF.

A brief review of my How To Think Like a Philosopher, drawing attention to the valuable thinking of David Hume and some Scottish connections.

_Therapeutic Approaches in Psychology_ is a simple introduction to the many psychological therapies in use today, including cognitive-behavioural, humanistic and psychodynamic approaches.

In his short life, Alan Turing (1912-1954) made foundational contributions to philosophy, mathematics, biology, artificial intelligence, and computer science. He, as much as anyone, invented and showed how to program the digital electronic computer. From September, 1939, his work on computation was war-driven and brutally practical. He developed high speed computing devices needed to decipher German Enigma Machine messages to and from U-boats, countering the most serious threat by far to Britain..

The attachment for download here merely references my 5,500-word final and extended article, criticising those who seek to justify Israeli attacks on Gaza. The article is published online by Daily Philosophy, 5th January 2024, link shown below. -/- After a background of facts (probably well-known by readers concerned about the matters), the article examines typical arguments much used in the media as attempts to justify Israel’s determined destruction of Gaza, involving well over twenty thousand Palestinians killed, hundreds of thousands suffering (...) appalling injuries and two million having their lives and livihoods shattered. -/- I expose inconsistencies, poor reasoning and immoralities of those who support Israeli actions. There is a final touch of Kant and Nietzsche - and use of the saying attributed to Jesus: For what shall it profit a man, if he shall gain the whole world and lose his own soul? (shrink)

Humanists acknowledge the absolute finality of death: it is annihilation. One may question whether sense can be made of life after death. Even if sense can be made, one may ask what evidence exists to justify belief that there is any such life. With the rejection of eternal life, and hence any risk of eternal damnation, humanists may argue that there is nothing to fear in death. One could argue against Lucretius that if there were to be the required similarity (...) between pre‐birth and post‐death non‐existence, then he/she should regret the lack of pre‐birth existence rather than overcome unhappiness at the lack of post‐death existence. There are numerous things that matter, and that mattering is not undermined by death as annihilation. Human mortality places a block on eternal life, but not on eternities that may yet give meaning to our lives. (shrink)

Some teeny extracts from the work - showing how the work covers more than the typical philosophers and how it has a lightness of style.

Let the marriage bond be the set of extralegal obligations to one another that individuals acquire in getting married. And let a conception of the marriage bond be an account of the nature and content of these. Here, I argue that the conception of this bond dominant among us is uncongenial to romantic love among individuals of a certain psychological type. Then, after articulating a conception more congenial to romantic love among such individuals, I argue that if we wish to (...) make marriage safer for love, we should make room in our thinking and practice for this conception, embracing a form of marital pluralism. (shrink)

Philosophy, the ?love of wisdom”, is the product of our endless fascination and curiosity about the world ? the child of wonder.

In this fun and entertaining book of puzzles and paradoxes, Peter Cave introduces some of life’s most important questions with tales and tall stories, reasons and arguments, common sense and bizarre conclusions. From speedy tortoises to getting into heaven, paradoxes and puzzles give rise to some of the most exciting problems in philosophy—from logic to ethics and from art to politics. Illustrated with quirky cartoons throughout, Can A Robot Be Human? takes the reader on a taster tour of the most (...) interesting and delightful parts of philosophy. It’s for everyone who puzzles about the world! (shrink)

Peter Cave once again takes the reader on a witty, engaging romp through a glorious compendium of philosophical puzzles. With the aid of tall stories, jokes, common sense, and bizarre insights, Cave tackles some of life’s most important questions and introduces the conundrums that will keep you pondering throughout the night. Illustrated with dozens of quirky cartoons, Do Llamas Fall in Love? leaves no stone unturned, covering a smorgasbord of topics including logic, ethics, art, and politics. It will provide a (...) perfect gift for anyone who puzzles about the world! (shrink)

Who are the Jews? What do they believe? Why is Israel so important to them? What's all this about self-hating Jews? These are just some of the questions that engage a Reform rabbi and a Humanist philosopher in their lively and intriguing conversations. From Antisemitism to Zionism, from animal slaughter kosher-style to the Zeitgeist of Jewish disparaging humour, rabbi Dan Cohn-Sherbok gives us the flavours, traditions and 'feel' of Jewish life and identity enmeshed in the importance of the Holy Land, (...) while philosopher Peter Cave gets him to dig deeper, revealing philosophical perplexities, unsettling questions -- and even Wittgenstein. The book is unique for it challenges unconscious assumptions such as the Jewish conviction that Judaism must survive and that Hitler must not secure a posthumous victory -- as well as widening eyes to searching questions concerning a nation's identity and what justifies territorial rights. Because Jewish humour plays a crucial role in Jewish life, this wide-ranging and thought-provoking exploration includes Jewish jokes and Dan's Jewish cartoons, all designed to add some spice to the dish of what it is like to be a Jew in these modern times. The dialogues introduce the non-Jewish to the Jewish world of argument, anguish and identity -- and will lead Jews to discover some fresh approaches and challenges to their interests and worries. For both Jews and non-Jews, this book casts lights -- with an engaging and accessible tone -- for, clearly, this rabbi and philosopher enjoy the cut and the thrust. (shrink)

This paper’s aim is to provide overview of the punishment of war crimes. It considers first the rationale of the law of war, the identification and scope of war crimes, and proceeds to consider the justification of punishing war crimes, arguing for a consequentialist view with side-constraints. It then considers the alternative of reconciliation.

In this book, Stephen Cave and John Martin Fischer debate whether or not we should choose to live forever. This ancient question is as topical as ever: while billions of people believe they will live forever in an otherworldly realm, billions of dollars are currently being poured into anti-ageing research in the hope that we will be able to radically extend our lives on earth. But are we wise to wish for immortality? What would it mean for each of us (...) as individuals, for society, and for the planet? -/- In this lively and accessible debate, the authors introduce the main arguments for and against living forever, along with some new ones. They draw on examples from myth and literature as well as new thought experiments in order to bring the arguments to life. Cave contends that the aspiring immortalist is stuck on the horns of a series of dilemmas, such as boredom and meaninglessness, or overpopulation and social injustice. Fischer argues that there is a vision of radically longer lives that is both recognizably human and desirable. This book offers both students and experienced philosophers a provocative new guide to a topic of perennial importance. (shrink)

Some people clearly do think of humanism as being a kind of creed or value system. The first “humanist manifesto” published in 1933 talked of humanism as a “new religion”. Nowhere does this idea ring more true than at weekend meetings of Ethical Societies in chilly and austere halls which can resemble Methodist chapels or Christian Scientist temples. It’s hard to resist the cheap shot that a lot of what has passed for atheistical humanism has been a kind of non-conformism (...) without the hymns. (shrink)

Thinking with Literature offers a succinct introduction to a cognitive literary criticsm, broad in scope but focusing on a particular cluster of approaches, some of which have so far been little used. Explanatory chapters and sections alternate with close readings of literary texts from a wide range of different periods and genres. The literary readings are not mere 'examples' of cognitive topics, still less of hypotheses in cognitive science: the central argument is that cognitive criticism must draw its primary energies (...) from the complexities of literature itself. The main objective of the book is to induce a change of perspective in the reader: to see the point, and the extreme interest, of adopting a cognitive approach to literary criticism. (shrink)

In cases where the best interests of the child are disputed or finely balanced, Clinical Ethics Committees (CECs) can provide a valuable source of advice to clinicians and trusts on the pertinent ethical dimensions. Recent judicial cases have criticised the lack of formalised guidance and inconsistency in the involvement of parents in CEC deliberations. In Manchester University NHS FT v Verden [2022], Arbuthnot J set out important procedural guidance as to how parental involvement in CEC deliberations might be managed. She (...) also confirmed substantive guidance on the role of parental views in determining the child’s best interests. We agree that it is good practice to ensure that the patient voice is heard in ethics processes, but how that is achieved is controversial. Surely it is best that what matters most to a patient and their family, whether facts or values, is conveyed directly to those considering the moral issues involved, rather than via a prism of another party. The approach suggested in theVerdencase has much in common with the process used by our CEC. In this article, we commend Arbuthnot J’s approach, provide an example of its effective operation and consider what it might mean for ethics processes. (shrink)

We consider measurements, described by a positive-operator-valued measure (POVM), whose outcome probabilities determine an arbitrary pure state of a D-dimensional quantum system. We call such a measurement a pure-state informationally complete (PS I-complete) POVM. We show that a measurement with 2D−1 outcomes cannot be PS I-complete, and then we construct a POVM with 2D outcomes that suffices, thus showing that a minimal PS I-complete POVM has 2D outcomes. We also consider PS I-complete POVMs that have only rank-one POVM elements and (...) construct an example with 3D−2 outcomes, which is a generalization of the tetrahedral measurement for a qubit. The question of the minimal number of elements in a rank-one PS I-complete POVM is left open. (shrink)

‘...if you learn to think like Peter Cave – with freshness, humour, objectivity and penetration – you will have been amply rewarded.’ :::: Prof. Felipe Fernandez-Armesto, University of Notre Dame __________________ Chapter Titles:>>> ___ 1 Lao Tzu: The Way to Tao >>> 2 Sappho: Lover >>> 3 Zeno of Elea: Tortoise Backer, Parmenidean Helper >>> 4 Gadfly: aka ‘Socrates’ >>> 5 Plato: Charioteer, Magnificent Footnote Inspirer – ‘Nobody Does It Better’ >>> 6 Aristotle: Earth-Bound, Walking >>> 7 Epicurus: Gardener, Curing (...) the Soul, Ably Assisted by Lucretius >>> 8 Avicenna: Flying Man, Unifier >>> 9 Descartes: With Princess, With Queen >>> 10 Spinoza: God-Intoxicated Atheist >>> 11 Leibniz: Monad Man >>> 12 Bishop Berkeley, ‘That Paradoxical Irishman’: Immaterialist, Tar-Water Advocate >>> 13 David Hume: The Great Infidel or Le Bon David >>> 14 Kant: Duty Calls, Categorically >>> 15 Schopenhauer: Pessimism With Flute >>> 16 John Stuart Mill: Utility Man, With Harriet, Soul-Mate >>> 17 Søren Kierkegaard: Who? >>> 18 Karl Marx: Hegelian, Freedom-Fighter >>> 19 Lewis Carroll: Curiouser and Curiouser >>> 20 Nietzsche: God-Slaying Jester, Trans-Valuer >>>> 21 Bertrand Russell: Radical, Aristocrat >>> 22 G. E. Moore: Common-Sense Defender, Bloomsbury’s Sage >>> 23 Heidegger: Hyphenater >>> 24 Jean-Paul Sartre: Existentialist, Novelist, French >>> 25 Simone Weil: Refuser and Would-Be Rescuer >>> 26 Simone de Beauvoir: Situated, Protester, Feminist >>> 27 Ludwig Wittgenstein: Therapist >>> 28 Hannah Arendt: Controversialist, Journalist? >>> 29 Iris Murdoch: Attender >>> 30 Samuel Beckett: Not I >>>. (shrink)

How do you know that you exist? What does it mean to have a future? Are you the same thing as your brain? What does it mean to be free? How can you know what knowledge is? A woman was advising her anguished friend, 'Be philosophical - then you won't need to think about it.' Well, being philosophical is sometimes taken to mean that you should adopt a resigned attitude to the world - a quiet-ism - but the study that (...) is western philosophy, starting with the ancient Greeks and continuing today in universities, bars and cafes - even bedrooms - is far from quiet. Philosophers think - but not just that, for they think about thinking and they think about how we think about the world, about how we conceive of ourselves, about how we possess a sense of right and wrong, about how we find meaning in life (if we do). How to Think Like a Bat might not help you to think like a bat, but it will certainly help you to think like a philosopher. Smart, witty and engaging, this is a superb introduction to the subject by one of Britain's most engaging philosophical writers. (shrink)

Uncertainty around the role ‘super-spreaders’ play in the transmission and escalation of infectious disease is compounded by its broad and vague definition. It is a term that has been much used in relation to COVID-19, particularly in social media. On its widest definition, it refers to a propensity to infect a larger than average number of people. Given the biological, behavioural and environmental variables relevant to infectivity, this might be pertinent to almost any infected individual who is not physically isolated (...) from others. Nor is the term confined to individuals with a propensity to spread infectious disease: it can potentially be used to describe events, policies or settings. This article explores the use of the term and considers circumstances in which the wide definition can be problematic. One problem is that it can lead to undeserved apportionment of moral blame to alleged super-spreaders. Another is that it can detract from scientific investigation of the heterogeneity of COVID-19 transmission. The author calls for a clearer epidemiological definition. (shrink)

This paper examines the UK’s response to a recent European Clinical Trials Directive, namely the Department of Health, Central Office for Research Ethics Committee guidance, Governance Arrangements for NHS Research Ethics Committees. The revisions have been long awaited by researchers and research ethics committee members alike. They substantially reform the ethical review system in the UK. We examine the new arrangements and argue that though they go a long way toward addressing the uncertainty surrounding ethics committee function, the system favours (...) the facilitation of research over the protection of the dignity and welfare of research participants. (shrink)

A retelling of Plato's famous cave allegory. Inspired by Dōgen, Nietzsche, and Wittgenstein.

John Stuart Mill was born two hundred years ago, on 20 th May, 1806. He died on 7 th May 1873. Peter Cave brings to life some of the thinking of this outstanding philosopher.

We prove a Gleason-type theorem for the quantum probability rule using frame functions defined on positive-operator-valued measures, as opposed to the restricted class of orthogonal projection-valued measures used in the original theorem. The advantage of this method is that it works for two-dimensional quantum systems and even for vector spaces over rational fields—settings where the standard theorem fails. Furthermore, unlike the method necessary for proving the original result, the present one is rather elementary. In the case of a qubit, we (...) investigate similar results for frame functions defined upon various restricted classes of POVMs. For the so-called trine measurements, the standard quantum probability rule is again recovered. (shrink)

Often we have coarsely grained knowledge: for example, we know about how many people are present. In possessing such knowledge, we also have finer grained knowledge of what is not: there certainly is nothing like that number of people here. The combination of such knowledge types, through sorites, generates contradiction and bafflement. This paper seeks to resolve the bafflement: it rejects a Timothy Williamson proposal, introduces muddle numbers and inference gaps, and shows how the different grains of knowledge do not (...) always meet. In so doing, the paper identifies a distinctive first‐person inferring. (shrink)

Look at any investment advertisement and you will encounter: PAST PERFORMANCE IS NO GUIDE TO FUTURE PERFORMANCE. This statement is a tribute to the power of the Financial Services Authority. Let us see how past performance plays with those down on the farm.

According to sexual liberals, sexual activity is an activity like any other, properly governed by rules drawn from the set of justified moral rules governing all human activities, sexual and non-sexual alike. There are sexual liberals who claim that all sexual activity involving none of force, fraud, or taking advantage of the desperate circumstances of another is morally unproblematic. Here I shall argue that sexual liberalism ought not to be so permissive. Appealing to considerations of autonomy and consistency, I shall (...) argue that that sexual liberals ought to regard some sexual seduction involving none of force, fraud, or taking advantage of the desperate circumstances of another as prima facie immoral always, and as on-balance immoral at least sometimes. (shrink)

Peter Cave's new book, Can a Robot Be Human? 33 Perplexing Philosophy Puzzles, covers a wide range of perplexities and paradoxes. Here, Peter raises some timely puzzles.

Among human beings, sexual pursuit takes many forms. Some forms, like courtship, are morally innocuous. Other forms, like rape, are categorically immoral. Still other forms are provisionally immoral. Such forms of sexual pursuit involve a wrongful element sufficient to render them wrongful on balance provided that this wrongful element is not counterbalanced by even more important competing moral considerations. Here my focus is a particular form of provisionally immoral sexual pursuit, unsavory sexual seduction , or unsavory seduction for short.