Logical Construct & Philosophy vs VietWise

Logical Construct is an educational puzzle app that makes formal logic genuinely playable. Instead of passively reading about reasoning, you actively construct valid proofs by applying the same inference rules used by logicians, mathematicians, and philosophers: Modus Ponens, Modus Tollens, Hypothetical Syllogism, Reductio ad Absurdum, and more. Each puzzle gives you a few premises and a target conclusion. Your job is to build a chain of deductions, one rule at a time, until you reach the conclusion. By doing the proofs yourself, not just reading about them, abstract logical concepts become concrete, intuitive skills. You'll progress through propositional logic, work with modal operators of necessity (□) and possibility (◇), and tackle advanced techniques like Conditional Proof and Reductio ad Absurdum. Classic philosophical arguments (the Paradox of Omnipotence, the Problem of Evil, Anselm's Ontological Argument, and Plantinga's modal version of it) become living frameworks for applying these principles. Reasoning that shaped two millennia of philosophy, now something you can practise on your phone. WHAT'S INSIDE • 20 levels, 60 puzzles, from your first Modus Ponens to S5 modal logic • 24 inference rules organised into six categories: conditional, conjunction, disjunction, negation, biconditional, and modal • Step-by-step solution viewer that reveals the proof one move at a time: it shows you the path, it doesn't solve it for you • Truth tables for every propositional rule, with the row where all premises are true highlighted so you can see why the rule is valid • Live formula highlighting that shows which lines a rule will use • Subproofs with Fitch-style indentation: the natural way to learn Conditional Proof and Reductio ad Absurdum • First-launch tutorial that walks you through your very first deduction, plus dedicated intros for subproofs and modal logic • Atom legend on every puzzle: tap to see what each symbol stands for and read the puzzle as a story in plain language • Neumorphic design with colour-coded rule categories • Progress tracking with automatic level unlocking WHO IT'S FOR Students strengthening their formal reasoning, philosophy enthusiasts curious about how arguments actually work, or anyone who enjoys a good puzzle that makes you think clearly. - Privacy Policy: https://sites.google.com/view/logicalconstructapp/accueil - Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Discover the timeless wisdom of Vietnamese culture, one saying at a time. VietWise brings you over 1,500 authentic Vietnamese proverbs, idioms, and sayings, each with Vietnamese audio, English translations, and meaningful explanations. Whether you're reconnecting with your heritage, learning the language, or exploring Vietnamese philosophy, VietWise makes traditional wisdom accessible and meaningful. WHAT YOU'LL GET: ▸ 1,500+ Authentic Sayings Carefully curated Vietnamese proverbs, idioms, and expressions covering life, relationships, success, patience, resilience, and more. ▸ Vietnamese Audio Perfect your pronunciation with quality Vietnamese audio for every saying. ▸ Clear English Translations Understand not just the words, but the deeper meaning behind each expression. ▸ Meaningful Explanations Learn what each proverb or idiom means and how it's used. ▸ Personalized Daily Feed Discover wisdom tailored to your interests and learning pace. ▸ Save & Organize Create custom collections of your favorite sayings to revisit anytime. ▸ Journal Your Reflections Write personal notes and insights as you explore each piece of wisdom. ▸ Track Your Progress Build daily learning streaks and watch your wisdom journey grow. PERFECT FOR: ▸ Vietnamese diaspora reconnecting with their roots ▸ Heritage learners exploring language and culture ▸ Students studying Vietnamese language ▸ Anyone interested in Eastern philosophy and wisdom ▸ Parents teaching children about Vietnamese culture ▸ Travelers preparing to visit Vietnam START FREE, UPGRADE WHEN READY: Begin your journey with free access to daily wisdom, audio pronunciation, and core features. VietWise Pro unlocks: ▸ Unlimited access to all 1,500+ proverbs, idioms, and sayings ▸ Ad-free experience ▸ Full history tracking ▸ Advanced learning analytics ▸ Progress insights ▸ Offline audio downloads ▸ Granular data management ▸ Early access to new features WHY VIETWISE? Unlike generic language apps, VietWise focuses specifically on Vietnamese cultural wisdom—the proverbs, idioms, and sayings that have guided generations. Each expression is more than just words; it's a window into Vietnamese values, history, and way of thinking. Whether you're taking 5 minutes during your morning coffee or reflecting in the evening, VietWise helps you stay connected to Vietnamese culture wherever you are. YOUR WISDOM JOURNEY STARTS HERE Download VietWise today and carry the wisdom of your ancestors with you. Start free and explore at your own pace. ABOUT SUBSCRIPTIONS: ▸ Monthly: $14.99/month ▸ Yearly: $39.99/year (save 78%) ▸ Payment charged to iTunes Account at confirmation of purchase ▸ Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period ▸ Manage subscriptions in Account Settings after purchase Privacy Policy: vietwise.app/privacy.html Terms of Service: vietwise.app/terms.html