What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 were a scientist, then x_7 is writing a letter. For all x_7, if x_7 were a writer, then x_7 is climbing a mountain. For all x_7, x_7 will work or x_7 is a scientist. For all x_7, if x_7 writes a letter, then x_7 is climbing a mountain. For all x_7, x_7 will not work or x_7 is a writer.
For all x_7, if x_7 were a scientist, then x_7 is climbing a mountain. For all x_7, x_7 is a scientist or x_7 is a writer.