This tutorial teaches the full forecast-record cycle on ten benign fictional events. Define the event and reference class, convert favourable cases to a natural frequency, lock a probability, reveal the staged outcome, calculate the Brier score, preserve every row, inspect the direction of the largest errors and write one method update for a fresh set. The exercise is not financial, medical or safety-critical forecasting.
This dossier explains the evidence and its limits. It is not a diagnosis, personal recommendation, assessment, clearance, performance promise or training programme. Actionable teaching appears only when the canonical Power record explicitly authorises it.
Complete bounded explanation
What this power means.
Capability to develop or express probabilistic reasoning in a declared context without inheriting broader claims.
What the current evidence supports
Probabilistic reasoning can improve through representation training and configured forecasting practice, with gains bound to problem form and system design.
How to observe or measure it without overclaiming
Declare event set, base rates, elicitation format, calibration, resolution, scoring rule, aggregation, missing outcomes and decision consequences.
Myth
Predict the future with certainty
Metric
Calibration, resolution and proper score on a predeclared event set
Boundary
Good forecasts in one domain do not establish foresight, certainty or safe high-stakes authority.
Negative and limiting findings
Frequency format did not add the expected benefit after nested-set training.
Tournament performance intertwined training, teams, aggregation, selection and attrition.
Claims this evidence cannot support
predict the future
become a human probability engine
Bayesian training eliminates uncertainty
forecast score proves wisdom
Evidence guide frame · non-prescriptive
A guide frame—not a training protocol.
Explain calibration and resolution in declared forecasting problems without implying certainty or high-stakes foresight.
What this frame may discuss
Evidence and measurement boundaries for probabilistic reasoning
Task specificity, access configurations and negative findings
Limits on transfer, efficacy and authority
Conceptual observations
Conceptually separate confidence calibration from the ability to distinguish outcomes.
Treat event definitions, base rates, resolution and missing outcomes as part of the forecast system.
Reflection prompts
What event set and resolution rule would make a probability auditable?
Could good aggregate calibration hide important errors or consequences?
What it cannot establish
Good forecasts in one domain do not establish foresight, certainty or safe high-stakes authority.
It cannot establish: predict the future.
It cannot establish: become a human probability engine.
It cannot establish: Bayesian training eliminates uncertainty.
It cannot establish: forecast score proves wisdom.
Accessibility alternatives
Fictional, benign events are sufficient; personal or consequential predictions are excluded.
Plain language, frequencies and visual formats are alternative representations.
No personal forecast submission or scoring is requested.
Non-participation remains valid: Yes.
Stop and escalation boundaries
Stop if the frame becomes betting, financial advice, medical prognosis, political persuasion or a scoring competition.
Stop if prediction tracking becomes compulsive or distressing.
This tutorial teaches the full forecast-record cycle on ten benign fictional events. Define the event and reference class, convert favourable cases to a natural frequency, lock a probability, reveal the staged outcome, calculate the Brier score, preserve every row, inspect the direction of the largest errors and write one method update for a fresh set. The exercise is not financial, medical or safety-critical forecasting.
OrientRead the definition, evidence, measurement boundary and prohibited claims on this canonical page.
BaselineOpen the governed lesson and record its declared baseline before practising.
PractiseFollow the ordered lesson exactly; do not add dose, intensity or claims.
RetestUse the lesson's delayed retention and predeclared transfer checks as separate records.
Maintain or retireKeep only what remains useful inside the evidence and safety boundary.
Authority boundary: A governed step-by-step lesson may be completed independently inside its stated limits. The method is Power-specific; its actionability follows this treatment.
Citation roles are explicit. A source may support existence or trainability while simultaneously limiting transfer, certainty, generalisation or safety.
Barbara Mellers; Eric Stone; Pavel Atanasov; Nick Rohrbaugh; S. Emlen Metz; Lyle Ungar; Michael M. Bishop; Michael Horowitz; Ed Merkle; Philip Tetlock · 2015 · Primary research
Miroslav Sirota; Lenka Kostovičová; Frédéric Vallée-Tourangeau · 2015 · Primary research
Current teaching and evidence boundary
The next gate remains visible.
No external confirmation is required for the current bounded explainer and non-prescriptive guide-frame permissions; any stronger efficacy, generalisation, protocol, promotion or independent-validation claim requires a new adjudication.
A separately governed practical lesson is available at /tutorials/pwr-115/. Its safe configuration, prerequisites, ordered practice, measurement, stopping, accessibility, retention, transfer and review rules remain controlling.