If the Following Argument Is an Instance of One of the "Famous

Short Answer

If the following argument is an instance of one of the "famous" argument forms, name the form and indicate whether the form is valid or invalid; if the argument is NOT an instance of one of the "famous" forms, simply write "unnamed form."
If either Gertrude or Herbert won, then both Jane and Kenneth lost. Since I know that either Gertrude or Herbert won, it must follow that both Jane and Kenneth lost.