Module 6 – Quantitative Deception & Evidence Logging

Intent

To prevent statistical and numerical manipulation from bypassing critical judgment through transparent logging and order-of-magnitude checks.Transformation
From intimidation by or blind acceptance of numbers → systematic numeric skepticism and auditable evidence trails.

Core Ideas

  1. Relative vs absolute risk, surrogate outcomes, p-hacking, and denominator distortion are common ways numbers mislead without direct falsehood.
  2. Fermi estimation forces rough, order-of-magnitude reality checks against exaggerated claims.
  3. The Evidence Log (who said what, when, with what source) creates a permanent, auditable trail that survives narrative shifts.

Structure

  • Demand base rates, sample size, and incentives behind any statistic
  • Apply Fermi-style rough calculation to test plausibility
  • Maintain a simple Evidence Log: claim → source → timestamp → verification status
  • Revisit the log when new information appears

Lesson Content

Numbers are among the most persuasive tools in public discourse, yet they are frequently used to obscure rather than clarify. A disciplined approach restores judgment.

Practical Example

A headline states “Crime up 50% under new policy.”
Fermi check: What was the original number? Is it 2 incidents to 3 (50% increase) or 200 to 300? The percentage alone is meaningless without the base rate.

Real-World Anchor

Elite communications often rely on vague or selective numbers (“no recollection,” “normal relationship”) to obscure material flows. Quantitative auditing combined with evidence logging exposes the gap between public statements and documented actions.

Exercise

Find a statistical claim in recent news.
Create an Evidence Log entry for it.
Perform a quick Fermi estimation and note whether the claim holds at order-of-magnitude level.

Representations

Synopsis

Numbers are powerful but frequently deceptive. Combine Fermi estimation with transparent evidence logging to restore judgment.Relational Map Outline
Central node: Quantitative Deception

  • Left branch: Common Techniques (relative risk, p-hacking, denominator tricks)
  • Right branch: Countermeasures (Fermi estimation, base rates)
  • Bottom branch: Evidence Log

Sketchnote Concept

A calculator with question marks over the display. Arrows pointing to a simple log table with columns: Claim | Source | Date | Verified?

Next

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