Consider the following premises. For all x_7, x_7 is a taxi driver or x_7 is not an astronaut. There is at least one x_7 for which x_7 is an astronaut or x_7 is not a musician. Can we infer the following from them? If we can, name the inference rule being used: For all x_7, the fact that x_7 were a musician does not imply that x_7 is a taxi driver.
That contradicts the premises. Therefore the answer is no.