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 listens to a song, then x_10 is reading a book. For all x_10, if x_10 were a mechanic, then x_10 is listening to a song. For all x_10, if x_10 reads a book, then x_10 is listening to a song. There is at least one x_10 for which x_10 will not read a book. For all x_10, if x_10 listens to a song, then x_10 is a mechanic.
There is at least one x_10 for which x_10 will not listen to a song. For all x_10, if x_10 were a mechanic, then x_10 is reading a book. For all x_10, if x_10 reads a book, then x_10 is a mechanic. For all x_10, x_10 will listen to a song if and only if x_10 will read a book. For all x_10, x_10 is a mechanic if and only if x_10 will listen to a song. For all x_10, x_10 will read a book if and only if x_10 will listen to a song. For all x_10, x_10 will listen to a song if and only if x_10 is a mechanic.