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: If Patricia reads a book, then it is windy. If it is windy, then Mary is working. If Mary works, then Susan is climbing a mountain. Patricia is reading a book.
It is windy can be inferred via the modus ponens rule. If Patricia reads a book, then Mary is working can be inferred via the transitivity rule. If it is windy, then Susan is climbing a mountain can be inferred via the transitivity rule.