“It is often claimed that smoking causes cancer. This is usually presented as a reason why people should either give up smoking, or else not start smoking. It is sometimes combined with other claims about smoking, such as that it is expensive or that it will lead to the deterioration of one’s looks.”
1) In those few lines, you have premises (stated and implied) and conclusions—identify all of them and then evaluate whether the argument is inductive (and if so, which kind) or deductive (and you have to cite the sources).
2) In the next paragraph describe how this argument would become stronger and weaker
3) Then follow with a paragraph in which you change the type of argument that could be made on the same principle ideas and how such new structure could be assessed.
4) Finally, evaluate whether any one of the arguments about smoking creates an argument that can not be refuted and, therefore, would ascertain that one does not smoke.