What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Karen were a doctor, then Thomas is writing a letter. It is sunny if and only if Karen is a doctor. If Thomas writes a letter, then Michael is playing a game.
If Karen were a doctor, then Michael is playing a game. If it is sunny, then Karen is a doctor. If Karen were a doctor, then it is sunny.