Why AI Misses IELTS Coherence Markers
Cohesion vs coherence · AI blind spots · May 2026
Updated
AI misses real IELTS coherence because it detects linking words and paragraph length, not whether each sentence advances the argument. An essay packed with However, Furthermore, and In conclusion can score Band 7 Coherence in a checker while an examiner caps it at Band 6 for list-like bodies and logical jumps. Coherence in IELTS is progression of ideas; cohesion markers are surface signals AI can count but cannot reliably validate against task logic.
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Cohesion markers vs logical coherence
Cohesion = visible ties between sentences. Coherence = the reader follows your reasoning without effort. AI conflates the two.
Patterns AI scores too high
| Essay pattern | AI tendency | Examiner cap |
|---|---|---|
| Moreover/Furthermore chains | Rewards CC subscore | Band 6, mechanical jumps |
| Template intro + three lists | Looks organized | Band 6, no progression |
| Repeated thesis in conclusion | Flags "clear structure" | TR/CC thin |
See coherence markers overuse and how AI evaluates coherence.
Train coherence AI cannot fake
1. One-idea paragraphs
Each body paragraph: claim → reason → example → link back to thesis.
2. Delete half your connectors
If removal does not break logic, the connector was decoration.
3. Human CC-only pass
Ask a tutor to score Coherence only, compare to AI on the same essay.
Key takeaways: Why AI Misses IELTS Coherence Markers
- Coherence = idea progression; cohesion markers are not proof.
- AI counts connectors; examiners audit argument chains.
- List bodies with links still cap at Band 6 CC.
- Fix structure before adding more However/Furthermore.
Why AI Misses IELTS Coherence Markers: common questions
Official IELTS references
The criteria and score bands on this page follow the public IELTS documents below. Band9AI is independent and not affiliated with the British Council, IDP or Cambridge.
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Practice drill: Why AI Misses IELTS Coherence Markers
Reading helps you understand the problem. A timed mock shows how it affects your band, one IELTS criterion at a time.
Free 2-min band diagnostic →| Tool | Timed four-skill mock | Score for each criterion | Action |
|---|---|---|---|
| ChatGPT / Copilot / Gemini | No | Chat only | N/A |
| Free IELTS practice sites | Partial / untimed | Limited or none | N/A |
| Band9AI | Yes: Listening, Reading, Writing, and Speaking | Yes, based on the public IELTS band descriptors | $15 Reality Check → |
What you get from a Band9AI mock
- A band for each criterion, such as Task Response, Coherence and Cohesion, Lexical Resource and Grammar in Writing
- The one mistake pattern holding your score back, not generic advice to keep practising
- Timed practice for one skill at a time, from your dashboard after checkout
Find whether your CC score is real, or connector theatre.
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