検索キーワード： 論理学・言語学

He invented the way we reason — and almost no one noticed. Gottlob Frege lectured to empty chairs in a provincial German university and, in near-total obscurity, rebuilt the foundations of human thought. He created modern logic out of almost nothing. He made the first serious attempt to prove that all of arithmetic is logic in disguise. And along the way he taught the world how meaning works — why a single thing can be named in two different ways, why a sentence quietly points at truth, why some thoughts seem to belong to no one at all.

For half a century, Jacques Derrida has been treated as the philosopher you either revere or refuse, the thinker whose famous “deconstruction” was supposed to dissolve every certainty into a fog of wordplay. Admirers called it liberation. Critics called it a confidence trick dressed in difficult French. Almost nobody asked the plainer question: when a text is deconstructed, what exactly is the operation being performed? Derrida himself declined to say. He insisted it was not a method, not a technique, not something you could lay out as a procedure.

This book argues that the most important moments in rational inquiry begin not with success, but with failure. When proof breaks down, when a framework falls silent before truths that appear stable and well-defined, something essential is revealed—not about the truth itself, but about the limits of the system meant to capture it. Moving between logic, mathematics, and physics, the book shows how undecidability and non-provability function not as walls, but as signals, guiding inquiry toward more adequate forms of explanation.

Master critical thinking and defeat information overload to make confident, stress-free decisions in a noisy world. Whether you are navigating workplace conflicts, scrolling through confusing online debates, or facing tough life choices, mental clutter drains your energy. This calming, practical...

Master the art of logic and elevate your critical thinking by tracing the fascinating history of human reasoning. Whether you are navigating complex modern debates or satisfying a deep intellectual curiosity during your daily commute, this thought-provoking journey reveals how ancient disputes...

Master critical thinking and historical philosophy to shield your mind against seductive nonsense and manipulation. When navigating a daily landscape of polarized debates and digital misinformation, you need an empowering intellectual toolkit. This accessible journey reveals how civilization...

Master critical thinking and conquer test prep anxiety with a ten-step verbal reasoning system that guarantees clarity. Whether you are commuting to a high-stakes job interview or studying for competitive exams, this practical audio guide transforms complex arguments into manageable concepts...

The human being is the only creature that does not merely live in the world but reads it. We wake into a flood of signs — words, faces, memories, headlines, silences — and we cannot help turning each one into meaning. This is not a hobby of scholars. It is the condition of being human, and it reaches from the way the brain assembles a sunrise to the way a civilization argues about its past.

Overcome mental fog and master critical thinking through guided, real-time argument analysis. Whether you are maximizing your morning commute or studying for high-stakes exams, this calm, systematic brain training cuts through the noise of abstract theory. You will actively practice spotting...

Conquer information overload and boost your career with practical philosophy built for everyday problem-solving. Perfect for your daily commute, this intellectually stimulating guide transforms traditional education into a dynamic toolkit for lifelong learners. Stop feeling paralyzed by modern...

Master critical thinking and win any debate by instantly spotting the manipulative arguments that hijack conversations. Whether you are navigating tense workplace meetings, surviving heated family dinners, or feeling overwhelmed by toxic social media feeds, this empowering guide provides the...

私たちは何を言語化することができ、あるいは言語化することができないのか――。 ２０世紀哲学の金字塔『論理哲学論考』をウィトゲンシュタイン研究の第一人者が解説。

Break free from emotional reactions and cognitive biases with practical mental habits that sharpen your everyday logic. Whether you are navigating a stressful morning commute, facing a tough career choice at work, or feeling overwhelmed by endless news feeds, a clear mind is your strongest...

Master critical thinking and upgrade your decision-making to transform daily stress into calm, confident clarity. Whether you are navigating complex work conflicts, managing your finances, or simply trying to make sense of a chaotic news cycle, a sharp mind is your ultimate asset. Stop reacting...

Ludwig Wittgenstein published a single slim book in his lifetime, announced that it had solved every problem in philosophy, and went off to teach schoolchildren in the Austrian countryside. Then he came back and spent the rest of his life dismantling it. This book follows that astonishing turn, and the one provocation that runs through all of it: that the limits of our language are the limits of our world. It is a beautiful claim. It is also, this book argues, not quite true.

Transform daily overthinking into mental clarity with this practical philosophy guide for navigating life's big choices. Whether you are listening on a busy morning commute or lying awake worrying about an uncertain future, these timeless ideas offer instant, contemplative comfort. Discover how...

Master the psychology of persuasion and transform heated conflicts into calm, logical communication. Whether navigating tense workplace negotiations or delicate intimate relationships, you can replace anxiety with strategic confidence. Harness the power of rhetoric to make your voice heard and...

Every serious argument quietly chooses a reality. It chooses what counts as true, what exists for the purpose of the claim, and which moves of reasoning are allowed. Most of the time this choice remains unspoken, hidden behind familiar language and shared habits. The result is a persistent illusion of neutrality—an illusion that fuels endless disputes in mathematics, physics, and philosophy, not because the world is obscure, but because the rules of speaking about it remain concealed. The Choice of Realities dismantles this illusion.

This audiobook is narrated by an AI Voice. Most human suffering is not caused by strangers, but by those we hold closest. We often fall into the trap of "emotional flooding," where we prioritize others' needs and expect reciprocity, only to be met with indifference or betrayal. The Unspoken Laws...

This classic work on critical thinking uses a novel approach to teach the basics of informal logic. On the assumption that "it takes one to know one," the authors have written the book from the point of view of someone who wishes to deceive, mislead, or manipulate others. Having mastered the art of deception, listeners will then be able to detect the misuse or abuse of logic when they encounter it in others—whether in a heated political debate or while trying to evaluate the claims of a persuasive sales person.