In short
Most teams don't decide badly for lack of smart people — they decide badly because nobody is ever taught how decisions work, and because the reasoning is never written down. Better reasoning is a structure, not a talent: frame the decision as one challengeable question, collect the arguments for and against in writing, weigh them on merit rather than on who said them, and keep the record.
That structure is The Argumentree Method, and it is what decision quality measures — a decision is judged by how it was made, not by how the outcome happened to land. None of it is specific to meetings: the same shape carries a classroom debate, a research review, a policy consultation or a DAO vote — see where it is applied.
New here? The topic chips below go straight to a subject, the cards under them are the library itself, and the Foundations path at the bottom sequences eight readings in the order they build on each other.
Browse by topic
Each of these opens a topic hub or a cluster index. Four layers are one chain, best read in order: cognitive bias is how a single mind misjudges, the 7 Argument Traps are what those errors look like once a group is talking honestly, Debate Foul Play is the same room when someone games it on purpose, and persuasion is the lever kit that works on either side.
Learn the material
The library itself — concepts, method, failure modes, and the writing that works through them.
Main Concepts
Start here. Definitional deep-dives — what the things are and how they work — across seven hubs and fifty-three pages, plus The Argumentree Method, the five-element discipline behind every argument tree.
Start with decision makingDecision Frameworks
Twelve framework guides, SWOT to ERM — each with a worked example and its argument-tree mapping.
Browse the frameworksArgument Traps
Seven named failure patterns of group reasoning — with warning signs and structural fixes.
Meet the trapsDebate Foul Play
The bad-faith tactics that break discussions on purpose — Gish Gallop, whataboutism, motte-and-bailey and two dozen more, each with its structural counter.
Open the field guideTutorials
Applied, step-by-step: run a design sprint, a pre-mortem, a Delphi study, an ADR process.
Open the tutorialsBlog
Eighty-three research-backed articles on decision science, collective intelligence, and leadership.
Read the blogShort Articles
Short-form: one idea, five minutes. Twenty-nine pieces, published here first and shared across our social channels.
Browse Short ArticlesVideos
Short walkthroughs of the method, the argument-level chains and the decision timeline — currently in production.
Coming soonPut it to work
The same method pointed at a decision you are actually making, or a purchase you are actually evaluating.
Tools & Templates
Four free interactive tools and four copy-ready templates — practice the method hands-on, no account needed.
Browse tools & templatesComparisons
Side-by-side comparisons: Argumentree versus other tools, roundups of the best options, and method-versus-method explainers.
Browse all comparisonsThe Method Applied
The same discipline in a named situation — classrooms, boards, communities, meetings, governance and compliance.
See it appliedLearning paths
Ordered sequences through existing pages, foundations first — the progression follows our long-form curriculum: understand it, then run it, then build an organization on it.
Path 1 · Foundations — how good decisions work
The concepts everything else builds on: what decision making is, the method, how reasoning fails at three scales — one mind, the group it is talking in, and someone working that group on purpose — and the science of groups that get it right.
- 1What is decision making?
- 2The Argumentree Method
- 3Cognitive bias: how one mind misjudges
- 4The 7 Argument Traps
- 5Persuasion: the same levers, aimed at you
- 6Wisdom of crowds: Galton's ox
- 7When crowds go wrong
- 8How to make better decisions
Path 2 · Application — running real decisions
From concepts to rituals: pick the right framework, run the session, keep the reasoning.
- 1Business decision frameworks: the chooser's guide
- 2SWOT analysis, run properly
- 3The pre-mortem, facilitated
- 4Design sprints that survive Monday
- 5From RFC to ADR: keeping the reasoning
- 6How to get stakeholder buy-in
Path 3 · Mastery — the organizational layer
One good decision is a skill; a stream of them is a system. Quality standards, governance, and the data-and-AI layer.
- 1Decision quality: the six elements
- 2Enterprise decision excellence
- 3Decision governance
- 4RAPID, RACI, DACI: run a decision-rights framework
- 5What is decision intelligence?
- 6The decision quality chain (deep dive)
The Argumentree family
Four products, one thesis: better reasoning is a structure, not a talent. Each product applies the argument tree to a different frontier:
Argumentree
The collaborative decision-making platform this library belongs to — argument trees, structured challenges, ratings, and a permanent decision record for human teams.
ArgumenTroupe
AI persona debates: test ideas against a cast of synthetic perspectives — focus groups, devil's advocates, Six Thinking Hats — before real stakes arrive.
AIAgentree
Governance for AI agents: decision tracing, audit trails, and EU AI Act alignment for organizations deploying autonomous systems.
Argumentree.AI
Multi-model AI research: several language models argue a question on one tree, so you see where they agree, where they split, and why.
Stop reading, start deciding
Everything in this library runs on one structure. Open a tree and put the method to work on a real decision.
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