What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Elisabeth were happy, then it is not snowing. It is snowing. For all x_7, x_7 will make tea if and only if x_7 is happy.
Elisabeth is not happy. For all x_7, if x_7 makes tea, then x_7 is happy. For all x_7, if x_7 were happy, then x_7 is making tea.