QUESTION TEXT: Wirth: All efforts to identify a gene…
QUESTION TYPE: Point At Issue
ARGUMENTS: Wirth argues that genes don’t cause manic-depression because no single gene causes manic-depression.
Chang agrees with Wirth’s evidence, but points out that there is evidence that several genes jointly cause manic depression.
ANALYSIS: Wirth makes a bad argument. Just because no single gene causes manic-depression doesn’t mean manic-depression can’t be influenced by genes. Chang correctly points out that multiple genes can act together to cause manic depression.
The point at issue is whether genes can cause manic-depression.
___________
- Wirth doesn’t even mention research that has examined the possibility that several genes can cause manic-depression.
- Wirth makes no claims about the future.
- Chang agrees that researchers believe that no single gene causes manic-depression.
- CORRECT. Wirth says yes. Chang points out that researchers think several genes jointly contribute to manic-depression.
- Neither of them talks about how thorough the efforts were.
Free Logical Reasoning lesson
Get a free sample of the Logical Reasoning Mastery Seminar. Learn tips for solving LR questions
Leave a Reply