How do you find what two viewpoints agree on and where exactly they part ways?
Agreement and disagreement on ACT Science: identifying the shared facts or premises both viewpoints accept and pinpointing the specific claim on which they diverge.
A focused answer on agreement and disagreement questions in ACT Science Conflicting Viewpoints passages: finding the shared facts or observations both views accept, pinpointing the exact claim on which they diverge, and testing a statement against each view to see who would accept it.
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What this topic is asking
A whole class of Conflicting Viewpoints questions asks about the relationship between the views: what they agree on and where they disagree. The skill is to separate the shared ground (the phenomenon and any facts both accept) from the point of divergence (the specific claim on which they differ). Doing this precisely is what these questions reward.
Find the shared ground
Competing explanations rarely disagree about everything. Almost always they agree on the phenomenon: the observation, event, or pattern that both are trying to explain. They may also share background facts that neither disputes. To answer an agreement question, look for the statement that both views would accept, which is usually:
- The phenomenon itself (the population fell, the colour changed, the planet has the orbit it has).
- Any data or observation both views build on.
The trap is an answer that states one view's distinctive claim, which the other side rejects. That is a point of disagreement, not agreement.
Pinpoint the disagreement
A disagreement question asks for the specific claim on which the views part ways. Because they agree on the phenomenon, the disagreement is usually about the explanation or mechanism: natural selection versus random change, comet impact versus volcanism, one process versus another. Name the one point that the views' claims contradict, not a general "they disagree." The ACT often offers a shared fact as a distractor, so make sure your answer is something one view asserts and the other denies.
Test a statement against each view
The most reliable technique for both kinds of question is to run a statement past each view and record who would accept it:
- Both accept the statement, then it is a point of agreement.
- One accepts and one rejects it, then it is a point of disagreement (and tells you whose claim it is).
- Neither holds it, then it is not in the passage and is a wrong answer.
This simple accept-or-reject test, applied to each option, sorts agreement from disagreement quickly and exposes distractors that belong to only one view or to neither.
Why precision matters
These questions punish vagueness. "They disagree about the lake" is too loose; the answer is the exact claim in dispute (the cause of the warming). Likewise, an agreement answer must be something genuinely shared, not a fact dressed up from one side. The accept-or-reject test forces the precision the ACT wants, and it connects directly to evaluation, where new evidence is judged against the specific claim in dispute, as in using evidence to support or weaken a view.
Try this
Q1. Two scientists give different causes for the same observed pattern. What are they most likely to agree on? [2 points]
- Cue. The phenomenon itself (the observed pattern), and possibly shared background facts, even though they disagree on the cause.
Q2. Describe the accept-or-reject test for deciding whether a statement is a point of agreement or disagreement. [2 points]
- Cue. Run the statement past each view: if both accept it, it is agreement; if one accepts and one rejects it, it is the disagreement; if neither holds it, it is not in the passage.
Exam-style practice questions
Practice questions written in the style of ACT exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
ACT Science (style)1 marksScientist 1 and Scientist 2 both accept that the moth population became darker over a century, but disagree on the cause. They would most likely agree that: (A) soot caused the change. (B) the moths became darker over time. (C) the change was random. (D) camouflage played no role.Show worked answer →
A 1-point agreement question.
The correct answer is (B), the moths became darker over time. Both scientists accept the observation (the phenomenon) even though they propose different causes. (A) is only Scientist 1's claim, (C) is only Scientist 2's, and (D) is Scientist 2's position alone. Agreement questions point to the shared facts or the phenomenon both views accept, not to either side's distinctive claim.
ACT Science (style)1 marksThe central disagreement between the two scientists is about: (A) whether the moths changed color. (B) the mechanism that caused the color change. (C) the species of the moth. (D) the length of the century.Show worked answer →
A 1-point item pinpointing the exact disagreement.
The correct answer is (B), the mechanism that caused the color change. Both accept that the color changed; they diverge on why, natural selection from soot versus a random genetic change. (A) is a shared fact, not a disagreement, and (C) and (D) are not in dispute. The disagreement is the one specific point on which the views' claims differ.
Related dot points
- The anatomy of a Conflicting Viewpoints passage on ACT Science: a shared phenomenon followed by two or more competing explanations that differ in their premises, read as arguments rather than data.
A focused answer on the structure of an ACT Science Conflicting Viewpoints passage: a shared phenomenon introduced, then two or more competing explanations (scientists or hypotheses) that disagree because of differing premises, read as arguments and the most reading-heavy format on the section.
- Tracking viewpoints on ACT Science: capturing each view's central claim in a phrase, noting its key reasoning, and answering detail questions by returning to the right view's argument.
A focused answer on tracking viewpoints in ACT Science Conflicting Viewpoints passages: summarising each view's central claim in a short phrase, noting the main reasoning behind it, distinguishing claims from supporting evidence, and returning to the correct view to answer detail questions.
- Evaluating evidence on ACT Science: deciding whether a new finding supports, weakens, or is neutral to a viewpoint by checking it against that view's specific claim and reasoning.
A focused answer on evidence-evaluation questions in ACT Science Conflicting Viewpoints passages: judging whether a new finding supports, weakens, or is neutral to a view by checking it against the view's specific claim, and recognising evidence that cuts against the rival view.
- A time strategy for the reading-heavy Conflicting Viewpoints passage on ACT Science: when to attempt it, how to read it once efficiently, and how to split claim-detail questions from evaluation questions.
A focused answer on managing the most text-heavy ACT Science passage: deciding when to attempt Conflicting Viewpoints in your pacing, reading the arguments once with active claim tracking, and handling the quicker claim-detail questions before the slower evaluation questions.
- Evaluating models and inferences on ACT Science: deciding which conclusion the data support, whether a hypothesis is consistent with a result, and rejecting claims that go beyond the evidence.
A focused answer on the Evaluation reporting category of ACT Science: deciding which conclusion the data actually support, judging whether a hypothesis is consistent with a result, and rejecting answers that overgeneralise or claim more than the evidence shows.
Sources & how we know this
- Description of the ACT Science Test — ACT, Inc. (2025)
- ACT Science Practice Test Questions — ACT, Inc. (2025)