Cognitive Architecture and Rationality
Upgrade your high-order thinking through rigorous epistemic calibration, systems dynamics, and meta-rational decision strategies. Move past basic cognitive biases to master causal inference, probabilistic modeling, and extended cognition.
Like Duolingo, but for Cognitive Architecture and Rationality. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Calibrating Judgment and Beliefs, High-Order Systems and Causal Diagnostics, and Meta-Rationality and Cognitive Leverage.
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Key ideas in Cognitive Architecture and Rationality
- Verbal probabilities like 'distinctly likely' conceal massive subjective spread (often spanning 40% to 85% across different listeners)
- Stating explicit numerical intervals (e.g., 65%–75%) forces a forecaster to confront what odds they would actually wager on
- Operational betting or capital allocation requires bounded numerical odds to determine positive expected value
- The inside view fixates on project-specific narrative details, novel features, and personal drive
- The reference class systematically ignores unique story elements in favor of distributional outcomes from similar past instances
- Selecting the reference class requires matching on structural constraints rather than surface optimism
- Brier scores aggregate mean squared error, meaning stellar accuracy in familiar domains easily masks severe overconfidence in unfamiliar ones
- True probabilistic calibration is domain-specific; calibration curves must be partitioned by category to diagnose local overconfidence
- A low aggregate Brier score can stem from base-rate tracking rather than genuine discriminatory skill in uncertain environments
- Smarter forecasters anchor to the broad historical baseline before looking at specific local evidence
- Evaluating specific team competence and product sprint metrics must only act as incremental Bayesian updates to the prior
- Reviewing case details first anchors the mind to an evocative narrative, causing irrecoverable base-rate neglect
- Simple averaging dilutes signal when diverse forecasters hold distinct, non-overlapping information that each independently points in the same direction
- Extremizing is valid only when forecaster errors are relatively independent, not when they all rely on the same shared correlated source
- Averaging already incorporates shared evidence; mathematical push toward the extremes corrects for the conservative drag of averaging independent signals
- High decoupling separates whether a causal chain is mechanically true from whether its conclusion is politically or morally desirable
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Cognitive Architecture and Rationality the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
When you force yourself to write down a tight bracket like '65%–75%' instead of 'probably', what happens?
Get it right to open this lesson and 20 more in the app.
Where Cognitive Architecture and Rationality takes you
- 1
Calibrating Judgment and Beliefs
- Calibrated Probabilistic Forecasting
- Epistemic Decoupling and Belief Revision
- 2
High-Order Systems and Causal Diagnostics
- Second-Order Dynamics and Systems Thinking
- Latent Variable Diagnostics and Heuristic Traps
- 3
Meta-Rationality and Cognitive Leverage
- Extended Cognition and Externalized Thought
- Causal Inference and Dialectical Synthesis
- Meta-Cognitive Governance and Attentional Architecture
3 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
Cognitive Architecture and Rationality is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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