Learning and knowledge
These tools are for learning: courses and learning paths, reading and study trackers, a language-learning tool and a library of concepts you can explore. Reading pages explain how people think, decide and know things.
The tools are free to use today and need a free account. “Open in the app” asks you to sign in or create one first.
SOS is an educational tool. It is not a doctor, therapist, financial adviser, lawyer or crisis service. Use it to learn and to keep track of your own life, and check anything important with a qualified person. Read the terms.
Tools that help
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Knowledge
Courses
Browse and enroll in SOS SkillForge courses.
Open in the app: Courses -
Knowledge
Learning Paths
Open in the app: Learning Paths -
Knowledge
Knowledge Graph
Explore the universal knowledge graph — concepts, thinkers, and ideas connected across philosophy, science, psychology, history, and more.
Open in the app: Knowledge Graph -
Knowledge
Reading Tracker
Track books, articles, podcasts, and courses.
Open in the app: Reading Tracker -
Knowledge
Language Learning
Open in the app: Language Learning -
Knowledge
Learning Goals
Set skill and certification goals with milestones, log study sessions, and track your learning streak.
Open in the app: Learning Goals -
Knowledge
Concept Explorer
Deep-dive into any concept from the knowledge graph — connections, related topics, breadcrumb navigation, and Wikipedia integration.
Open in the app: Concept Explorer -
Knowledge
Concept of the Day
A daily featured concept from the knowledge graph — same for everyone each day.
Open in the app: Concept of the Day -
Knowledge
Knowledge Browser
Search, filter, and browse knowledge graph concepts by keyword, category, and difficulty.
Open in the app: Knowledge Browser -
Knowledge
Concept Pathways
Pick two concepts from the knowledge graph and get a suggested outline of how they might connect.
Open in the app: Concept Pathways -
Knowledge
My Learning
Personal learning dashboard — active enrollments, streak, badges, subject mastery, and certification portfolio.
Open in the app: My Learning -
Knowledge
Knowledge Base
Personal research library, notes, and curated learning resources.
Open in the app: Knowledge Base -
Knowledge
Concept Challenge
Daily challenge: given two random knowledge nodes, explain the conceptual connection chain.
Open in the app: Concept Challenge -
Knowledge
Knowledge Quiz
Test your understanding of concepts across science, philosophy, history, and more.
Open in the app: Knowledge Quiz -
Knowledge
Epistemology
The philosophy of knowledge.
Open in the app: Epistemology -
Knowledge
Social Epistemology
How communities create, share, and distort knowledge.
Open in the app: Social Epistemology -
Knowledge
Connection Explorer
Pick any two concepts and watch the knowledge graph reveal how they connect — multi-hop paths, edge explanations, and surprising cross-domain links.
Open in the app: Connection Explorer -
Knowledge
Memory Science
Learn faster and remember longer: spaced repetition, retrieval practice, the Method of Loci, Feynman Technique, interleaving, chunking, and a personal practice tracker.
Open in the app: Memory Science -
Knowledge
Cognitive Biases
Open in the app: Cognitive Biases -
Knowledge
Meta-Learning Science
Open in the app: Meta-Learning Science -
Knowledge
Epistemics
Calibrated uncertainty (Tetlock, superforecasters), Bayesian reasoning, Scout.
Open in the app: Epistemics -
Goals
Cognitive Biases Lab
Open in the app: Cognitive Biases Lab
Help answers on this topic
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