Evidence selection is a boundary problem. Too little evidence leaves the answer unsupported. Too much evidence hides the relationship the question is testing and can import irrelevant or contradictory material.
The smallest-sufficient-evidence rule
Find the smallest piece of the passage that proves the answer completely. Then decide whether the question permits quotation or requires explanation in your own words.
Worked example
Jon had promised to leave before sunset. At six he was still repairing the old bicycle, although dark clouds had already covered the hill. He tightened one final bolt, tested the brakes twice, and only then began the journey home.
Question: What suggests that Jon was careful about the bicycle’s safety?
Over-copied: At six he was still repairing the old bicycle, although dark clouds had covered the hill, and he tightened one final bolt, tested the brakes twice, and only then began the journey home.
The clouds and time do not prove care about bicycle safety. The strongest evidence is that he tested the brakes twice before leaving. If the question asks what suggests the quality, that evidence is sufficient.
Evidence has a radius
The answer may sit in one phrase, one sentence, or across two separated sentences. Do not assume the entire paragraph is the evidence unit. Expand outward only until the required relationship is complete.
Copying can hide misunderstanding
A long quotation may accidentally contain the correct words without showing that the student knows why they matter. When explanation is required, convert the evidence into the relationship being tested.
Evidence versus background
| Passage material | Function |
|---|---|
| directly proves the answer | core evidence |
| helps identify who/when/where | context |
| interesting but does not prove the demand | irrelevant to this question |
| points against the proposed answer | counter-evidence; reconsider |
Two-source questions
Sometimes one piece establishes a fact and another supplies its significance. Join them deliberately rather than copying everything between them.
The town planted five hundred young trees in 2018. Three summers of unusually low rainfall followed. By 2022, fewer than half of the original trees remained, prompting the council to change both species selection and watering plans.
If asked why the council changed its approach, the evidence chain is low rainfall + poor survival. “Five hundred trees” is scale information, not the cause of the change.
Transfer drill
Leah had practised the presentation repeatedly at home. When the projector failed, she paused, moved her notes aside and continued without the slides. Afterwards, she admitted that her hands had been shaking throughout.
Select the smallest sufficient evidence for the claim that Leah remained composed despite being nervous.
Explained answer
Two pieces are needed because the claim contains two parts. Her shaking hands establish nervousness; her pausing and continuing without the slides establishes composed action. Her practice at home is background preparation, not direct evidence that she remained composed during the failure.
Selection routine
- Underline the exact demand in the question.
- Find the strongest proving phrase.
- Expand only if another part is necessary.
- Remove context that does not prove the answer.
- Check for counter-evidence before committing.
Continue with comprehension precision, argument and evidence tracking, or the English Learning Hub.