hard · LSAT
A high-fiber diet is necessary for maintaining optimal digestive health. Therefore, if one maintains optimal digestive health, one must have a high-fiber diet.
The reasoning in the argument is:
- Sound, because saying fiber is required for digestive health already means anyone with that health has the fiber.
- Unsound, because it ignores the other factors that also contribute to digestive health.
- Unsound, because it treats a condition that is merely necessary as though it were sufficient.
- Sound, because the conclusion is simply the contrapositive of the opening statement.
- Unsound, because no single dietary factor could ever be required for digestive health.
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