Monday, 12 January 2026

AI Agent Spreadsheet Pitfalls: When the Data Is Right but the Chart Falls Short

 Analytical errors rarely come from lack of tools—they come from reused thinking. When the same chart structures, assumptions, or visual templates are applied mechanically, even correct data can lead to misleading conclusions. This article examines one such case, where AI had full access to data and tools, yet failed at a basic analytical judgment.

📘 For readers who want to strengthen the thinking that precedes charts and models, my book  AI for the Rest of Us focuses on reasoning-first analysis—so AI accelerates insight instead of quietly distorting it.


Download this article as a PDF — ideal for offline reading or for sharing within your knowledge circles where thoughtful discussion and deeper reflection are valued.


When AI Knows the Tools but Misses the Path

Part 2 of the AI + Data Analysis Series


AI can access the tools. Humans still choose the path.


When Tools Are Available but Direction Is Missing

The first part of this series 2026: The Year We Stop Asking If AI Works, and Start Asking If We're Using It Right focused on why AI-generated chart images fail at accuracy. This second part deals with something more subtle and relevant to everyday analytical work: It asks what happens when AI has correct data, proper tools, and native access to spreadsheets, yet still produces the wrong analytical outcome.

This is no longer about visual hallucination. It is about analytical friction.


The Chart Was Ordinary. The Outcome Wasn’t.

The task was simple and familiar.
A valuation chart designed to explain where the market stands—not to predict the future.

It required:

  • Three valuation zones

  • One actual P/E line

  • A visual that supports interpretation, not storytelling

Any finance professional would classify this as routine work. There was no novelty, no experimental intent, and no ambiguity about the goal.

That is precisely why the outcome mattered.


What Was Expected vs What Actually Happened

With clean spreadsheet data and full access to charting tools, the expectation was straightforward: identify the data relationship and select an appropriate visual form.

Instead, the process turned iterative.

Charts were generated quickly, but repeatedly missed the point. The system tried stacked bars where incremental logic was needed, absolute values where relational meaning mattered, and area-style visuals where discrete valuation zones were intended. Each step was executed correctly in isolation, yet the overall direction drifted away from intent.

This revealed a key contrast.
AI executed fast.
Human judgment corrected direction.

Speed was not the constraint. Path selection was.


Why This Isn’t Just a “Prompting Issue”

It is easy to say that better prompts would fix this. But that explanation assumes the user already understands chart semantics, incremental logic, and analytical intent clearly enough to specify every step in advance.

That creates a contradiction.

If the user already knows all this, AI adds limited analytical value.
If the user doesn’t, asking for perfect instructions defeats the idea of assistance.

This tension is structural, not user error.


The Fishbone Moment: Four Causes Behind One Wrong Chart

This experience can be broken down into four interacting causes. Think of them as branches of a fishbone, all pointing to the same outcome.

1. Pattern Recognition Without Meaning

AI recognises familiar chart patterns but does not reliably understand why one structure fits a situation better than another. Exposure to millions of charts does not equal semantic understanding.

2. Execution Without Validation

Commands are carried out accurately, menus work, charts render cleanly—but there is no built-in pause to ask, “Does this match the analytical intent?”

3. Tool Access Without Judgment

Even inside spreadsheet environments with native access, the system defaults to template-driven thinking when requirements move beyond standard use cases.

4. Trial-and-Correction Instead of Path Selection

Humans choose the correct path early in familiar domains. AI explores multiple paths and corrects later. In analytics, that difference is critical.

This is not a failure of capability. It is a limitation of the reasoning sequence.


When Built-In AI Shows the Same Limitation

What makes this more instructive is that the issue appears even within tightly integrated ecosystems. AI operating directly inside spreadsheet software handles standard charts well. But the moment the requirement becomes intent-driven—valuation zones, incremental logic, semantic layering—the output degrades into static or image-like representations. The incorrect visual below is a symptom of this. It shows a correct table leading to incorrect meaning. 

This confirms that the limitation is not about access or integration. It is about reasoning before execution.

AI-generated chart with incorrect logic / colour banding

The Human Path: The Correct Analytical Outcome


This final visualization, achieved after human judgment corrected the iterative process, demonstrates the required semantic layering: discrete valuation zones (color banding) are clearly separated from the actual P/E line. This difference—the ability to select the right analytical path early—is the true value of human oversight.


Why This Matters Beyond One Chart

Charts are just the visible surface.

The same pattern appears in financial models, dashboards, analytical summaries, and strategic recommendations. Outputs look professional, numbers are correct, and execution is flawless—yet the underlying logic is off.

That kind of error is harder to detect and more dangerous than obvious failure.


What Comes Next

This second part has illuminated the friction points in the analytical process—where AI, despite having the tools and the data, fails in sequencing and judgment. The next logical question is: What does the human mind do differently? 

Part 3 will answer this by focusing on the core difference: why human intuition catches conceptual errors instantly. 

Part 3 Title: Why AI Still Struggles With Meaning: A Simple Chart, a Carrot, and a Hard Truth

Moving beyond tools and charts, we will use a simple, everyday example to discuss meaning itself—how we sense when a conceptual flaw exists even before we can articulate the data-driven reason.

The chart was only the symptom of the problem. The true limitation lies deeper, in the architecture of human understanding.The real issue lies deeper, in how understanding works.


Download this article as a PDF — perfect for offline reading or sharing with friends on social media!


Read More

Part 1 -  2026: The Year We Stop Asking If AI Works, and Start Asking If We're Using It Right

Our other  AI articles


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