What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Karen makes tea, then it is overcast. If it is overcast, then it is late. If it is cloudy, then Karen is making tea. If it is late, then it is cloudy.
If Karen makes tea, then it is late. If it is overcast, then it is cloudy. If it is cloudy, then it is overcast. If it is late, then Karen is making tea.