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 writes a letter, then x_10 is a doctor. For all x_10, if x_10 were a doctor, then x_10 is drinking water. For all x_10, x_10 will not drink water. Patricia is writing a letter or it is raining.
For all x_10, x_10 is not a doctor. For all x_10, if x_10 writes a letter, then x_10 is drinking water.