What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: If Jessica were an astronaut, then Jennifer is a nurse. If Susan plays squash, then Jessica is an astronaut. For all y, y will not drink water. If Jennifer were a nurse, then Patricia is drinking water. If Patricia drinks water, then Jennifer is a nurse.
If Susan plays squash, then Jennifer is a nurse can be inferred via the transitivity rule.