Conflicting Viewpoints

Learning Objectives

• Identify the central claim of each viewpoint in a Conflicting Viewpoints passage
• Understand the evidence or reasoning each viewpoint uses to support its claim
• Identify specific points where viewpoints agree (shared assumptions or observations) and where they disagree (competing explanations or interpretations)
• Predict which viewpoint a given new piece of evidence would support or contradict
• Identify assumptions that must be true for each viewpoint's reasoning to work
• Compare the logical structure of competing scientific arguments
• Evaluate whether new information would support, weaken, or be irrelevant to each viewpoint
• Apply the act-conflicting-viewpoints-strategy to navigate text-heavy passages efficiently
• Recognize when two viewpoints share a premise even when their conclusions differ

High-Yield Concepts

Reading and Mapping Viewpoints

The most effective strategy for Conflicting Viewpoints passages is active comparative reading: read to build a clear mental summary of each viewpoint before encountering the questions.

For each viewpoint, extract three pieces of information as you read:

1. The central claim: what is the scientist's main explanation or position?
2. The key evidence or reasoning: what specific observations or logic support the claim?
3. The mechanism or prediction: what does this viewpoint say will happen, and why?

A quick mental or scratch-paper summary: "Scientist 1 claims [X] because [Y]. Scientist 2 claims [A] because [B]. They agree that [shared observation]. They disagree about [specific point of contention]."

Agreement and Disagreement Questions

Agreement questions ask what both scientists would acknowledge or accept. Look for information presented in the introductory paragraph (which both viewpoints are built on) and for premises that both viewpoints explicitly share even while they disagree about the explanation.

Disagreement questions ask what specifically divides the viewpoints. The disagreement is usually about mechanism (how/why something happens), not about the phenomenon itself (that it happens). Both scientists typically agree on the observations; they disagree on what causes or explains them.

Evidence and Prediction Questions

Evidence questions ask which viewpoint a described piece of new evidence would support or contradict. To answer: determine what the evidence shows (its direction and what variable it relates to), then evaluate each viewpoint's prediction about that variable or relationship. The evidence supports the viewpoint whose prediction matches what the evidence shows; it contradicts the viewpoint whose prediction is the opposite.

Prediction questions ask what a specific scientist would predict about an untested scenario. To answer: apply the scientist's stated mechanism to the new scenario. What does the mechanism imply about what should happen in the new conditions? Choose the answer that follows logically from that mechanism.

Study Strategy

Begin with understanding the passage structure: one introductory paragraph of shared context, followed by two or more viewpoints, each with a claim, evidence, and mechanism. Practice identifying these elements in each viewpoint before moving to questions.

Next, practice the mental summary strategy: after reading each viewpoint, state in one sentence what the scientist claims and why. This takes 30-60 seconds and makes all subsequent questions much faster.

Study agreement and disagreement question types together. Practice identifying shared premises by checking whether a statement appears in the introduction or is something both scientists explicitly accept. Practice finding disagreements by comparing the mechanisms of two viewpoints directly.

Study evidence and prediction questions next. These require extending each viewpoint's logic to new information, which is the highest-reasoning task in this unit. Practice by taking a viewpoint's mechanism and asking "what would this mechanism predict about X?"

Cover the remaining topics (identifying assumptions, theory comparison, model comparison) as a final cluster. These appear in harder questions and require the same core skills applied at a slightly higher level of abstraction.

Common Mistakes

• Reading Conflicting Viewpoints passages too quickly and conflating which scientist said what
• Selecting agreement answers that represent only one scientist's position
• Selecting disagreement answers that describe the general topic rather than the specific point of contention
• On evidence questions, evaluating the evidence based on its topic rather than its direction (a study about temperature can support OR contradict a viewpoint depending on what it found about temperature)
• Predicting based on outside knowledge about which scientific view is currently accepted rather than what the specific passage's logic requires
• Confusing what a scientist assumes (implicit premise) with what they state explicitly (evidence)
• Selecting the wrong scientist in "Scientist 1 would predict..." questions by mixing up which claim belongs to which scientist

Exam Tips

• Read the introduction paragraph carefully -- it provides the shared context that both viewpoints accept and prevents you from treating it as one scientist's unique claim
• After reading each viewpoint, write its core claim in 5 words or fewer on scratch paper
• For evidence questions, determine what the evidence shows before evaluating which viewpoint it supports -- do not evaluate by topic alone
• For prediction questions, trace the scientist's mechanism: "their claim is X because Y; if Z happened, then based on Y, the result would be..."
• If you are stuck on a comparison question, re-read only the opening sentence of each viewpoint section -- the central claim is almost always there
• The Conflicting Viewpoints passage is typically the longest to read; budget an extra 60-90 seconds for initial reading compared to Data Representation passages
• Questions about this passage type are not always the hardest numerically -- they are often more readable than complex graph interpretation questions once you have the strategy