Consider the following premises. Joseph is bored if and only if it is raining. Charles is climbing a mountain if and only if it is raining. Joseph is not bored. For all x_15, if x_15 works, then x_15 is climbing a mountain. Can we infer the following from them? Charles is working.
 From the fact that for all x_15, if x_15 works, then x_15 is climbing a mountain we can infer that if Charles works, then Charles is climbing a mountain. From the fact that Joseph is bored if and only if it is raining, and that Joseph is not bored we can infer that it is not raining. From the fact that Charles is climbing a mountain if and only if it is raining, and that it is not raining we can infer that Charles is not climbing a mountain. Finally, from the fact that if Charles works, then Charles is climbing a mountain, and that Charles is not climbing a mountain we can infer that Charles is not working, which contradicts that Charles is working. Therefore, the answer is no.