What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_4, y_4 will not sleep. For all y_4, y_4 will sleep or y_4 is curious. For all y_4, y_4 is not a politician. There is at least one y_4 for which y_4 is a politician or y_4 is a musician.
For all y_4, y_4 is curious. There is at least one y_4 for which y_4 is a musician.