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 were a mechanic, then x_10 is a poet. There is at least one x_10 for which if x_10 were a poet, then x_10 is a mechanic. For all x_10, x_10 is a poet or x_10 is not a mechanic.
For all x_10, if x_10 were a mechanic, then x_10 is a poet. There is at least one x_10 for which x_10 is a poet if and only if x_10 is a mechanic. There is at least one x_10 for which x_10 is a mechanic if and only if x_10 is a poet.