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: Karen is not writing a letter or Linda is a cashier. Patricia is not cooking or Karen is writing a letter. Patricia is not running or it is cold. For all x_9, x_9 will cook or x_9 will go running.
Nothing can be inferred from these premises.