What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_11 for which x_11 is not a scientist. For all x_11, x_11 will play a game or x_11 is sad. For all x_11, x_11 will not play a game or x_11 is happy. For all x_11, if x_11 were a scientist, then x_11 is sad. For all x_11, if x_11 were sad, then x_11 is a scientist.
There is at least one x_11 for which x_11 is not sad. For all x_11, x_11 is sad or x_11 is happy. For all x_11, x_11 is a scientist if and only if x_11 is sad. For all x_11, x_11 is sad if and only if x_11 is a scientist.