Consider the following premises. For all x_11, x_11 is an astronaut or x_11 is happy. For all x_11, if x_11 were happy, then x_11 is excited. For all x_11, x_11 is excited if and only if x_11 is a carpenter. There is at least one x_11 for which if x_11 were an astronaut, then x_11 is excited. Can we infer the following from them? For all x_11, x_11 is not a carpenter.
 From the fact that there is at least one x_11 for which if x_11 were an astronaut, then x_11 is excited, that for all x_11, if x_11 were happy, then x_11 is excited, and that for all x_11, x_11 is an astronaut or x_11 is happy we can infer that there is at least one x_11 for which x_11 is excited. From the fact that for all x_11, x_11 is excited if and only if x_11 is a carpenter we can infer that for all x_11, if x_11 were excited, then x_11 is a carpenter. Finally, from the fact that for all x_11, if x_11 were excited, then x_11 is a carpenter, and that there is at least one x_11 for which x_11 is excited we can infer that there is at least one x_11 for which x_11 is a carpenter, which contradicts that For all x_11, x_11 is not a carpenter. Therefore, the answer is no.