Introducing the FOUR BASES
⏱ 4 min
What to do
Answer the checkpoint question by choosing which FOUR BASES criterion is most likely violated in the draft scenario.
Introducing the FOUR BASES
⏱ 4 min
Concept: The FOUR BASES are four evaluation criteria—Unity, Support, Coherence, Sentence skills—used to assess and revise academic writing. Each BASE answers a different question about your draft.
Mechanism: When revising, you apply each BASE in turn. Ask: Does every sentence support the thesis? (Unity) Do claims have evidence and explanation? (Support) Is the order logical and are transitions clear? (Coherence) Are grammar and tone correct? (Sentence skills)
| Criterion | Meaning |
|---|---|
| Unity | Every sentence supports the thesis. |
| Support | Claims are backed by evidence and explanation. |
| Coherence | Ideas flow in logical order; transitions are clear. |
| Sentence skills | Grammar and word choice are accurate; tone is appropriate. |

Worked example: If a paragraph mentions "AI may help diagnostics" but then discusses education funding, that violates Unity—the second sentence does not support the thesis.
How success is measured
You choose the correct BASE and use the feedback to check why that criterion fits the scenario.
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