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: It is cloudy if and only if Linda is playing squash. Barbara is a poet or Linda is not playing squash.
If Linda plays squash, then Barbara is a poet can be inferred via the rewriting rule. If it is cloudy, then Linda is playing squash can be inferred via the biconditional elimination rule. If Linda plays squash, then it is cloudy can be inferred via the biconditional elimination rule.