Consider the following premises. It is not cloudy. It is cloudy if and only if Sarah is a sailor. Sarah is a sailor or Linda is sad. Can we infer the following from them? Michael is running or Linda is sad.
 From the fact that it is cloudy if and only if Sarah is a sailor, and that it is not cloudy we can infer that Sarah is not a sailor. From the fact that Sarah is not a sailor we can infer that Sarah is not a sailor or Michael is running. Finally, from the fact that Sarah is not a sailor or Michael is running, and that Sarah is a sailor or Linda is sad we can infer that Michael is running or Linda is sad. Therefore, the answer is yes.