Practise clearer thinking and apply it to your real decisions.
Go to LearnSpace and select the Thinking Lab tab (🧠). The Overview names one next step and shows today's thinking challenge.
The same lessons, mental models, thinking methods and book notes are public at myfulljourney.com/thinking-lab — 36 lessons across 11 modules, 37 mental models, 48 methods and the big ideas of 119 books — free to read without an account. Signed in, this tab adds the practice, your saved answers and your own decisions.
Learn opens with Foundations — fast against deliberate thinking, observation against interpretation, fact against assumption, and metacognition. Each module lists the concepts every lesson covers, so you can go straight to the one you want.
Eleven modules follow: Critical, Problem Solving, Creative, Logical, Decision, Systems, Strategic, Reflective, Argumentation and Questioning. Each is Think (one hard question, before any lesson) → Learn → Practise → Apply → Reflect. The chips at the top show which steps you have done at least once.
Every lesson ends with “Put it to work in…” — My Thoughts, My Courses, My Expertise, My Creations, or a planner in Tools. It opens that tab with the lesson’s prompts on top. Marking “I tried it” there moves the module to Applied here, and it is listed in LearnSpace › Review.
Library → "What do you want to get better at?" Type something like "I want to improve my ability to handle conflict" and it returns a path rather than a reading list: two or three books, where to practise it in the Lab, a real-life application, and what to ask yourself afterwards. If nothing matches closely it says so rather than guessing.
The Library holds 119 books across 17 domains — philosophy, learning, critical thinking, logic, problem solving, decisions, creativity, systems, emotions, conflict, strategy, society, science, probability, knowledge, communication and character. Every book page is the same six parts: the ideas it contains, the methods written out so you can run them tonight, an exercise, where it shows up in real life, which thinking it builds, and a reflection box. Nothing here reproduces a book and nothing replaces one.
Each 🛠 Thinking tool on a book page opens into numbered steps you can follow, plus when to reach for it and — always — what it will not do. Pólya's four steps, Toulmin's six argument parts, de Bono's six hats, the premortem, interests against positions, Bayesian updating, deliberate practice and about forty more.
Mental models gives you 37 lenses grouped by what they are for. Each one is What is it → Practice (a real box you answer now) → Apply (what to do with the answer) → where it misleads. A model you have used once is available to you later; a model you have read is a word you recognise. There is a model of the day on the landing view.
Practice → Philosophy Lens takes one real problem through seven frameworks — definition (Plato), what is up to you (Marcus Aurelius), excess and deficiency (Aristotle), consequences and for whom (Mill), if everyone did it (Kant), who it makes you, and where you are forcing. They disagree with each other on purpose.
Practice → Learning Lab turns "I want to learn economics" into goal → prior knowledge → questions → learning path → retrieval → practice → application → reflection, built from the learning research rather than from how studying feels.
Practice → Bias Detector runs six questions over any claim: what is claimed, what evidence supports it, what is missing, what else could explain it, what might bias your own judgement, and what would change your mind. Paste something you read, or practise on one of the examples.
Practice → Problem Solver is the nine-step version: problem → define as a gap → symptoms and causes → assumptions → break into parts → alternatives → evaluate → experiment → learn. Step nine is filled in after the experiment, and that is what makes it transferable.
Practice → Systems Map walks the parts, the arrows, the loops, the delays, the constraint and the leverage point — then asks which break point you could realistically act on this week. In a system, the thing you fix and the place the problem shows up are often not the same place.
Practice → Conflict Simulator gives you a situation (or takes your own), asks what you would do on instinct FIRST, then works the questions: what the conflict is actually about, your assumptions, their view, both sides' interests, what escalates, what opens a path, and the opening line you would actually say. Then you compare with your instinct.
Practice → Daily challenge is one short prompt a day — observation, assumption, reframing, counterargument, cause or second-order thinking. Four to six minutes. Nothing accumulates if you miss some.
Practice → Practice Lab gives you a real situation. Define the problem, name your assumptions, work out what evidence you would want, generate alternatives, follow the consequences, then write your reasoning. There is no answer key — the six steps are the exercise.
Practice → Thinking Gym groups quick exercises by kind: Logic, Critical thinking, Problem solving, Creativity, Decision making and Systems. Each one lists what a considered answer tends to contain rather than a correct answer.
Practice → Argument Lab walks Claim → Evidence → Reasoning → Counterargument → Response → Conclusion. Your argument is locked before the companion reads it, and it replies with questions about what is unsupported or assumed — never a verdict on whether you are right.
Write what you believe and why, the evidence on both sides, the assumption carrying the most weight, and what would change your mind. The goal is not to change your opinion — it is to find out whether you can examine your own reasoning.
Practice → Perspective Lab gives the same situation to different positions inside it — customer, product, financial, competitor, long-term — or lets you bring your own problem and work the general lenses.
Apply → Real-life thinking takes a goal you actually hold through nine questions: what exactly it is, why you want it, what you are assuming, what evidence supports the path, what alternatives exist, your constraints, what could go wrong, what success looks like and what the next experiment is. You can pick a goal you have already written down in Journey.
Apply → Decision journal records a decision before you know how it turned out: context, options, evidence, unknowns, assumptions, risks, what you expect and what you chose — plus how hard it is to undo and a date to look again. That date is the point; without one this is a diary.
On the review date the decision comes back to you on the Overview. Write what happened, what you got right and wrong, which assumptions failed and what you learned. What you wrote at the time cannot be edited, so the review stays honest.
Apply → Thinking projects are longer pieces returned to over weeks: Solve a real problem, Analyse a claim, or Make a difficult decision. Save one step at a time. Closing a project asks how it ended — letting one go with a reason is a real outcome and stays readable.
Questions you cannot answer, insights, mistakes in your reasoning, things you noticed, problems you are working on and beliefs you changed. A question can stay open and get an answer added months later.
Seven modes open your companion with a different brief: Socratic (asks only), Challenger (goes after assumptions), Critic (examines reasoning, not conclusions), Idea partner, Decision partner, Reflection and Tutor. Anywhere in Thinking Lab the companion is also told not to solve the exercises for you.
Progress shows counts of what you did — challenges completed, decisions reviewed, reflections, projects, concepts learned and times you reconsidered an assumption — plus which kinds of thinking you have practised most and which you have not practised yet. There is no score, level or ranking, and each dimension moves Learned → Practised → Applied, where only something real reaches Applied.
Progress → Weekly review opens once you have done a few things in a week. Seven questions about what you questioned, learned, assumed, decided and changed your mind about, plus what to practise next week.
Life lessons in the Thinking Lab sidebar holds Risk & uncertainty: six short lessons on the cost of not deciding, calculated vs reckless risk, protecting the downside, reversible choices, small bets and knowing when to quit, with a practice and a small real-life bet. The Decision journal links to it.
Open Thinking Lab — train the way you think, not just what you know in the app (sign-in required).