検索キーワード： 論理学・言語学

Philosophical Investigations was published in 1953, two years after the death of its author. In the preface written in Cambridge in 1945 where he was professor of philosophy he states: ‘Four years ago I had occasion to re-read my first book (the Tractatus Logico-Philosophicus) and to explain its ideas to someone. It suddenly seemed to me that I should publish those old thoughts and the new ones together: that the latter could be seen in the right light only by contrast with and against the background of my old way of thinking.’

Mysticism and Logic. The first essay, which gives its title to the volume, endeavors to define the respective spheres of logic and mysticism. Bertrand Russell describes this and the four essays that follow as “entirely popular”.

What if, every time you wanted to write down 1,000,000, you had to draw a picture of a god? And what if that number were the biggest you had a symbol for? If you were doing math in ancient Egypt, those were the rules: anything bigger broke math. As mathematician Richard Elwes shows in Huge Numbers, this is the strange story of math. Even today, writing down some numbers is beyond us: try it with all the zeroes in a googolplex, or an outrageous alien number like TREE(3). Safer not to try: even harnessing every particle in the universe, you wouldn’t come close.

According to the philosopher Ludwig Wittgenstein (1889–1951), philosophy is a “battle against the bewitchment of our intelligence by means of language.” This audacious idea changed the way many of its practitioners saw their subject. In the first biography of Wittgenstein in more than three decades, Anthony Gottlieb evaluates this revolutionary idea, explaining the evolution of Wittgenstein’s thought and his place in the history of philosophy.

Hegels Logik von 1812 komplett (aber ohne die Anmerkungen) in 36 Stunden vorgelesen und mit einem ausführlichen Inhalts- und Trackverzeichnis versehen.

Published four years after Rousseau's death, Confessions is a remarkably frank and honest self-portrait, described by Rousseau as "the history of my soul". From his idyllic youth in the Swiss mountains, to his career as a composer in Paris and his abandonment of his children, Rousseau lays bare his entire life with preternatural honesty.

Quantum physics is notable for its brazen defiance of common sense. (Think of Schrödinger's Cat, famously both dead and alive.) An especially rigorous form of quantum contradiction occurs in experiments with entangled particles. Our common assumption is that objects have properties whether or not anyone is observing them, and the measurement of one can't affect the other. Quantum entanglement rejects this assumption, offering impeccable reasoning and irrefutable evidence of the opposite. Is quantum entanglement mystical, or just mystifying?

Perhaps the most important work of philosophy after the Allegory of the Cave. Incomparable logic and findings about the things that matter in life with a clear, succinct prose touch.

Knowledge is power! Crush the competition at trivia night, or start the most interesting conversation ever with real facts that are hard to believe. This book is loaded with mind-blowing facts that are sure to keep you wondering, "How are these even true?" while equipping you to outsmart everyone around and blow their minds.

In closely reported stories from the streets of New York to the seats of intellectual power, MacDonald shows how bad ideas get started and then acquire a life of their own. Her reports trace the transformation of influential opinion-makers and large philanthropic foundations from confident advocates of individual responsibility, opportunity, and learning into apologists for the welfare state.

What is language? Why do we have it? Where does it come from? Why does that matter? Upending centuries of scholarship (including, most recently, Chomsky and Pinker) The Language Game shows how people learn to talk not by acquiring fixed meanings and rules, but by picking up, reusing and recombining countless linguistic fragments in novel ways.

Ellenberg chases mathematical threads through a vast range of time and space, from the everyday to the cosmic, encountering, among other things, baseball, Reaganomics, daring lottery schemes, Voltaire, the replicability crisis in psychology, Italian Renaissance painting, artificial languages, the development of non-Euclidean geometry, the coming obesity apocalypse, Antonin Scalia's views on crime and punishment, the psychology of slime molds, what Facebook can and can't figure out about you, and the existence of God.

Why can’t you light a candle in a spaceship? What books are bad for you? Is nature natural? Every year Oxford and Cambridge’s learned professors pose such curious conundrums to potential students to separate the wheat from the chaff, and the clever from the both of them. Do You Think You’re Clever? provides dazzling answers to 60 of these infamously perplexing problems... How would you measure up against Oxbridge’s sharpest minds?

Co-authored by Greg Lukianoff and Nadine Strossen, The War on Words: 10 Arguments Against Free Speech—And Why They Fail constitutes a bulwark against the persistent censorial efforts from both the political left and right. At a time when conformist pressures threaten viewpoint diversity, and when political attacks on free expression are mounting, this book is a valuable resource for all who seek to understand and defend the right that is central to both individual liberty and our democratic self-government.

Heresy Press’s first non-fiction offering addresses free speech and creative freedom—central to the Press’s mission—through a systematic debunking of the most common pro-censorship arguments. Co-authored by Greg Lukianoff and Nadine Strossen, The War on Words: 10 Arguments Against Free Speech—And Why They Fail constitutes a bulwark against the persistent censorial efforts from both the political left and right.

In an age of information overload, the real competitive edge is clarity. This guide distills the proven reasoning strategies that philosophers, data scientists, and world-class strategists rely on—then packages them into 100 bite-size methods that locks the idea in your memory.

Even the most reasonable of us can be selective about when we think reasonably—we might take pride in our rationality about professional matters but follow our gut when it comes to social issues, for example. In a world of rabbit holes, echo chambers, and disinformation, how can we keep our heads on straight more consistently? How to Think More and Better offers a philosopher's advice on becoming a more rational and critical thinker.

Truth before Logic explores the provocative implications of the claim that “you can only find truth with logic if you have already found truth without it.” Chesterton counters the sterile, truncated worldview of scientism with an appeal to a deep awareness in the heart and mind without which there would be neither science nor religion.

Modern life is hectic and it's easy to lose sight of what truly matters. This book is a reminder to pause and reconnect with deeper meaning behind your actions. This book shares wisdom from ancient philosophers in a relatable way. Their revelations offer a fresh perspective on today's challenges and those you'll face tomorrow.

Este es el inicio de La tabla esmeralda, uno de los textos más misteriosos y fascinantes de la historia humana. Pero, ¿quién es Thoth el Atlante? Existen incontables mitos sobre él: que fue el creador de la alquimia, el profeta que anunció el advenimiento de Cristo. Lo único cierto es que su nombre verdadero fue Hermes Trismegisto, «el tres veces grande», y que fue el autor de La tabla esmeralda.