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ChatGPT gives one opinion from one model: ungoverned, untraceable, unaudited. Decision Intel is the reasoning audit platform. Most tools audit your data; we audit your reasoning — and catch the fatal blind spots in strategic memos before the committee does. It measures the noise in your reasoning the same way Kahneman did in the insurance underwriter study, simulates an AI boardroom of CEO, CFO, and board personas, runs what-if interventions against a 143-case public reference library, and compounds every confirmed outcome back into a calibrated Decision Quality Index your audit committee can defend. Not a chatbot; a reasoning audit, checkable from memo to outcome.

Which cognitive biases caused Nortel Networks's collapse?

5 bias patterns are documented in this case, led by Recency Bias. The full set: Recency Bias, Overconfidence Bias, Groupthink, Framing Effect, Hindsight Bias. Each is mapped to Decision Intel's 22-bias R²F taxonomy with stable IDs and academic citations.

What is Decision Intel's reasoning audit?

Decision Intel runs a 12-node Recognition-Rigor Framework (R²F) pipeline on strategic memos, detecting cognitive biases from a 22-bias canonical taxonomy and producing a Decision Quality Index (DQI) score. The audit produces a hashed, tamper-evident Decision Provenance Record (DPR) suitable for audit-committee review.

All case studies

Catastrophic failureTechnology2009

Nortel Networks

Nortel Networks Collapse

Estimated impact: $250B in peak market cap destroyed

F14

Decision Quality Index (simulated)

Critical · 5 biases detected, 2 toxic combinations

Once valued at $250B and representing one-third of the Toronto Stock Exchange, Nortel filed for bankruptcy after years of accounting fraud and failed strategic pivots. The company restated $3.4B in revenue and was fined for inflating results to trigger executive bonuses.

Decision context

Whether Nortel's strategy of aggressive acquisitions during the telecom bubble, funded by inflated stock, was sustainable once the bubble burst.

Decision anatomy

Monetary stakes

Very high

Dissent suppressed

Yes

Time pressure

Present

Unanimous consensus

Yes

Decision participants

Dissent encouraged

External advisors

Iterative process

Red = risk factor present · Green = protective factor present

Deep hindsight-stripped analysis coming soon. This case is part of our ongoing backfill to reconstruct what the platform would have flagged at decision time. The summary and bias profile below are drawn from primary sources.

Biases present in the decision

★Recency Bias

critical

Overconfidence Bias

high

Groupthink

high

Framing Effect

medium

Hindsight Bias

medium

★ Primary driver · Severity estimated from bias type and decision outcome

3D Decision Knowledge Graph

Nortel Networks · 5 biases, 2 toxic combinations

Drag to rotate · Scroll to zoom · Click to explore

Decision

Critical

High

Medium

Toxic

Bias Intensity Profile

Severity × confidence across 5 detected biases

Toxic combinations

!Recency Spiral

Compound cognitive failure pattern identified in this decision.

!Echo Chamber

Group members reinforce each other's views, systematically filtering out dissenting signals.

Reference class base rates

Across all 143 curated case studies in our library:

89%

base failure rate

-0%

partial / mixed

11%

base success rate

■ Failure■ Partial■ Success

Lessons learned

Recency bias from telecom bubble valuations led to acquisition spree at peak prices
Accounting fraud to maintain the appearance of growth is often a lagging indicator of a fundamentally broken business model
Post-bubble, hindsight bias made the collapse seem obvious, but at the time Nortel was considered a national champion

Source: Ontario Securities Commission proceedings against Nortel executives (2012); Nortel bankruptcy filing (2009) (SEC Filing)

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Workflows that fire on decisions like Nortel Networks’s

The same Recognition-Rigor Framework that documents this case audits memos in the same shape — before the outcome forces the lesson.

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Lessons learned

Recency bias from telecom bubble valuations led to acquisition spree at peak prices

Accounting fraud to maintain the appearance of growth is often a lagging indicator of a fundamentally broken business model

Post-bubble, hindsight bias made the collapse seem obvious, but at the time Nortel was considered a national champion