Consider the following premises. For all y, y will make tea if and only if y is a sailor. If Linda were a sailor, then Linda is making tea. Linda is not a sailor. Can we infer the following from them? Linda is making tea.
 From the fact that for all y, y will make tea if and only if y is a sailor we can infer that Linda is making tea if and only if Linda is a sailor. From the fact that Linda is making tea if and only if Linda is a sailor we can infer that if Linda makes tea, then Linda is a sailor. From the fact that if Linda were a sailor, then Linda is making tea, and that if Linda makes tea, then Linda is a sailor we can infer that Linda is a sailor if and only if Linda is making tea. Finally, from the fact that Linda is a sailor if and only if Linda is making tea, and that Linda is not a sailor we can infer that Linda is not making tea, which contradicts that Linda is making tea. Therefore, the answer is no.