Buster Benson's Cognitive Bias Codex vs. TellDear's Six Dimensions — A Cross-Reference

In 2016, Buster Benson published what became one of the most-read Medium articles of all time: the "Cognitive Bias Cheat Sheet." Starting from Wikipedia's unwieldy list of 175+ cognitive biases, he organized them into a framework so clear and memorable that it spawned an iconic infographic (by John Manoogian III), a book (Why Are We Yelling? The Art of Productive Disagreement, Portfolio/Penguin, 2019), and became the de facto reference for anyone trying to make sense of human irrationality.

TellDear takes a fundamentally different approach: 535 aspects across six dimensions, designed not to explain why we think poorly, but to identify what goes wrong in specific texts and arguments. This article cross-references both frameworks — and asks what each can learn from the other.

Benson's Framework: Four Problems, Twenty Strategies

Benson's key insight was organizational: every cognitive bias exists because it solves a real problem. He identified four meta-problems that all biases address:

1. Too much information — We must filter, so we notice what's primed, bizarre, changed, or confirming. (Availability Heuristic, Confirmation Bias, Anchoring, Negativity Bias...)
2. Not enough meaning — We fill gaps with patterns, stereotypes, projections, and simplified probabilities. (Clustering Illusion, Halo Effect, Hindsight Bias, Base Rate Fallacy...)
3. Need to act fast — We overestimate our abilities, prefer the immediate, complete what we started, and default to safe options. (Dunning-Kruger, Sunk Cost, Status Quo Bias, Loss Aversion...)
4. What to remember — We edit memories, discard details, keep peaks and endings, and store by experience quality. (Peak-End Rule, False Memory, Serial Position Effect...)

This framework is deskriptive Psychologie at its best: it explains the evolutionary function of each bias. It answers the question "why does this bias exist?" with an answer that makes intuitive sense.

TellDear's Framework: Six Analytical Lenses

TellDear takes a different stance. It asks: "When I look at a piece of text — a political speech, a news headline, a social media post — what kinds of things can go wrong?" The answer is organized into six dimensions:

• D1: Logical Fallacies (83 aspects) — Structural invalidity: the argument's form is broken. Affirming the Consequent, Hasty Generalization, False Dichotomy...
• D2: Manipulation & Propaganda (57 aspects) — Deliberate rhetorical strategies: Fearmongering, Loaded Language, Whataboutism, Thought-Terminating Clichés...
• D3: Cognitive Biases (124 aspects) — Unconscious psychological tendencies: Confirmation Bias, Anchoring, Dunning-Kruger, Availability Heuristic...
• D4: Statistical & Methodological Errors (81 aspects) — Data-level problems: P-Hacking, Simpson's Paradox, Survivorship Bias, Selection Bias...
• D5: Argumentation Schemes (32 aspects) — Normative patterns from argumentation theory: Argument from Expert Opinion, Practical Reasoning, Argument from Precedent...
• D6: Discourse Mechanics (33 aspects) — Social and media dynamics: Overton Window, Agenda Setting, Framing Effects, Echo Chambers...

Where Benson asks "why do we think this way?", TellDear asks "what's happening in this text?" The difference is between a psychologist's notebook and a forensic analyst's toolkit.

The Overlap: Where Both Frameworks Meet

The overlap is substantial but confined to a single dimension. TellDear's D3 (Cognitive Biases) covers approximately 90-95% of everything in Benson's framework. This is unsurprising: Benson's Codex is a cognitive bias taxonomy, and D3 is TellDear's cognitive bias dimension.

The mapping is remarkably clean:

TellDear's D3 even uses a similar sub-categorization: A (Information Overload), B (Pattern-Finding), C (Decision Biases), D (Memory Editing) — four groups that map almost directly to Benson's four problems.

The Gap: What Benson Doesn't Cover

Here's where it gets interesting. Benson's framework is exclusively about cognitive biases — the unconscious, automatic mental shortcuts we all share. But human reasoning goes wrong in many more ways than just bias:

• Logical structure can be invalid (D1) — An argument can be logically broken regardless of anyone's biases. "If it rains, the street is wet. The street is wet. Therefore it rained." This is a formal logical error (Affirming the Consequent), not a cognitive bias. Benson doesn't touch this.
• People manipulate deliberately (D2) — Propaganda techniques, loaded language, and rhetorical tricks are intentional strategies, not unconscious biases. A politician using fear to drive voter turnout isn't suffering from a cognitive bias — they're exploiting one. Benson's framework describes the exploited, not the exploiter.
• Data can be methodologically flawed (D4) — P-hacking, cherry-picked samples, misleading visualizations — these are methodological errors that exist independently of any individual's psychology. A graph with a truncated Y-axis isn't a cognitive bias; it's a statistical trick.
• Argumentation has normative structure (D5) — Argumentation theory (Walton, Toulmin) provides legitimate patterns of reasoning that can be used well or poorly. "The expert says X" is a valid scheme — with critical questions that must be satisfied. Benson's framework doesn't address normative reasoning at all.
• Discourse has its own dynamics (D6) — Echo chambers, agenda setting, the Overton Window — these are emergent social phenomena that shape what gets discussed and how, independent of any individual's biases.

In other words: Benson covers one of TellDear's six dimensions brilliantly — and leaves the other five untouched. This isn't a criticism of Benson; his project was always about cognitive biases specifically. But it illustrates why a single-lens framework, however well-organized, is insufficient for comprehensive reasoning analysis.

What TellDear Can Learn from Benson

Benson's framework offers something TellDear currently doesn't: a compelling explanatory narrative. When someone encounters "Anchoring Bias" in TellDear, they learn what it is and how to spot it. But Benson tells them why their brain does this — because the world changes and we need reference points to evaluate new information. That's more memorable and more compassionate.

Specifically, TellDear could benefit from:

1. Adding "evolutionary function" to D3 aspect descriptions — For each cognitive bias, a one-line explanation of which of the four problems it solves. This would make the taxonomy more learnable and less pathologizing.
2. Reviewing a handful of potentially missing biases — Benson includes some that may not have explicit counterparts in D3: Restraint Bias (overestimating self-control), Self-Consistency Bias (remembering past behavior as more consistent than it was), and the Law of Narrative Gravity (information being pulled toward dominant narratives).
3. Referencing Benson's work in the bibliography — His Cheat Sheet and book are among the most accessible introductions to cognitive bias for a general audience. They belong in any comprehensive reference list on the topic.

What Benson's Framework Misses (That Matters for Real-World Analysis)

The flip side: if you only had Benson's framework and tried to analyze, say, a political speech, you'd identify some of the psychological biases at play — but you'd miss:

• The logical fallacies in the argument structure
• The propaganda techniques being deliberately employed
• The statistical manipulation of cited data
• The argumentative schemes being used (and whether their critical questions are satisfied)
• The discourse dynamics — why this speech is given now, to this audience, framed this way

This is precisely why TellDear uses six dimensions instead of one. A single dimension gives you depth in one area. Six dimensions give you the ability to see what's actually happening in a complex piece of communication.

Conclusion: Complementary, Not Competing

Benson's Cognitive Bias Codex and TellDear's six-dimension taxonomy are not competitors — they are complementary frameworks addressing different questions:

• Benson answers: "Why does the human brain systematically deviate from rational thinking?" → Because it solves four fundamental problems (information overload, meaning-making, fast action, memory management)
• TellDear answers: "What is going wrong in this specific text or argument?" → It could be logical, manipulative, cognitive, statistical, argumentative, or discursive — often several simultaneously

The ideal toolkit includes both: Benson's empathetic, evolutionary explanation of why we think this way, and TellDear's analytical framework for identifying what's happening right now, in this text. Understanding the former makes you more compassionate; mastering the latter makes you more perceptive.

Both are needed. Neither alone is sufficient.

References

• Benson, B. (2016). Cognitive Bias Cheat Sheet. Medium.
• Benson, B. (2019). Why Are We Yelling? The Art of Productive Disagreement. Portfolio/Penguin. ISBN 978-0525540106.
• Benson, B. (2017). Cognitive Bias Cheat Sheet, Simplified. Medium.
• Manoogian III, J. (2016). Cognitive Bias Codex [Infographic]. Based on Benson's framework.
• Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.