What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, if x_10 were happy, then x_10 is climbing a mountain. For all x_10, x_10 is an astronaut. There is at least one x_10 for which if x_10 were a musician, then x_10 is climbing a mountain. For all x_10, x_10 is happy or x_10 is a musician.
There is at least one x_10 for which x_10 will climb a mountain.