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: There is at least one x_7 for which x_7 will sleep. For all x_7, x_7 will drive a car. For all x_7, x_7 will climb a mountain.
For all x_7, x_7 will drive a car and x_7 will climb a mountain can be inferred via the universal conjunction rule. For all x_7, x_7 will climb a mountain and x_7 will drive a car can be inferred via the universal conjunction rule. There is at least one x_7 for which x_7 will sleep and x_7 will drive a car can be inferred via the existential conjunction rule. There is at least one x_7 for which x_7 will sleep and x_7 will climb a mountain can be inferred via the existential conjunction rule. There is at least one x_7 for which x_7 will drive a car and x_7 will sleep can be inferred via the existential conjunction rule. There is at least one x_7 for which x_7 will climb a mountain and x_7 will sleep can be inferred via the existential conjunction rule.