

This site provides a "critical thinking framework" that shows you one way to step through an argument under review.
This lesson focuses on Step 4 of the framework: If evidence is provided, is it sound?
In Lesson C, we saw what happens when reasoning is missing. Now we will compare two arguments that both appear calm and structured — but differ in the quality of their evidence.
I oppose the carbon tax because it places an unfair burden on families. Many people I know are already struggling with high living costs. Energy prices have risen significantly in recent years, and adding a tax only makes things worse. In my view, this policy harms ordinary people more than it helps the environment.
I oppose the carbon tax because it may disproportionately affect lower-income households. According to public finance reports, energy costs represent a larger percentage of income for low-income families than for higher-income households. If rebates do not fully offset those costs, the tax may increase financial strain. Before expanding the policy, governments should publish clear data showing how net household costs are distributed across income levels.
This version feels calm. But calm tone is not the same as strong evidence.
This version does not rely on emotion. It connects claim → data → policy question.
It is possible to:
Critical thinking requires verifying which is which.
For each version, answer:
1. What evidence is provided?
Version 1: ____________________________________________
Version 2: ____________________________________________
2. What would strengthen Version 1?
____________________________________________
3. Does Version 2 fully prove its case, or does it raise questions for further study?
____________________________________________
Why is it important not to confuse:
How does stronger evidence affect your willingness to stay engaged?
____________________________________________
Reasonable tone does not guarantee reliable evidence.