It has been claimed that television networks should provide equal time for the presentation of opposing views whenever a television program concerns scientific issues—such as those raised by the claims of environmentalists—about which people disagree. However, although an obligation to provide equal time does arise in the case of any program concerning a program concerns scientific issues, that program gives rise to no such equal time obligation.
What this question is testing
Conclusion
The author wants you to walk away thinking: TV programs about science don't need to give equal time to opposing views.
Evidence
The reason equal time is required for social-issue programs, the author says, is that social issues (1) have political implications and (2) can't be settled by evidence. Then the author says scientific issues are different and so don't trigger the obligation.
Evaluate
Notice the unstated leap. The author's own rule is: a topic triggers the equal-time obligation if it has political implications and can't be settled by evidence. The author assumes scientific issues don't have those features. To weaken the argument, we just need to show that scientific issues actually do have both features. If they do, the author's own reasoning would force the obligation onto them too — contradicting the conclusion.
Goal
The right answer says: scientific issues actually do have important political implications and can't be settled by evidence — pulling the rug out from under the author's distinction.
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