Doctor: Being overweight has long been linked with a variety of health problems, such as high blood pressure and heart disease.
Opposing Point
Being overweight has long been linked with a variety of health problems, such as high blood pressure and heart disease.
Premise
But recent research conclusively shows that people who are slightly overweight are healthier than those who are considerably underweight.
Conclusion
Therefore, to be healthy, it suffices to be slightly overweight.
Evaluate
It could be that neither those who are slightly overweight or considerably underweight are healthy. There is a difference between someone who is healthier than someone else and someone is actually healthy. This is the difference between a relative claim and one that is absolute.