What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it is late, then it is cold. If it is late, then Thomas is drinking water. If it is cold, then it is late. If Thomas drinks water, then Karen is playing squash.
If it is late, then Karen is playing squash. If it is cold, then Thomas is drinking water. It is late if and only if it is cold. It is cold if and only if it is late.