What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_11, x_11 will climb a mountain. For all x_11, x_11 is a scientist. There is at least one x_11 for which x_11 will sleep.
For all x_11, x_11 will climb a mountain and x_11 is a scientist can be inferred via the universal conjunction rule. For all x_11, x_11 is a scientist and x_11 will climb a mountain can be inferred via the universal conjunction rule. There is at least one x_11 for which x_11 will sleep and x_11 will climb a mountain can be inferred via the existential conjunction rule. There is at least one x_11 for which x_11 will sleep and x_11 is a scientist can be inferred via the existential conjunction rule. There is at least one x_11 for which x_11 will climb a mountain and x_11 will sleep can be inferred via the existential conjunction rule. Some scientists will sleep can be inferred via the existential conjunction rule.