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."
Terrorists have legitimate grievances. And the grievances of terrorists should be addressed assuming that terrorists have legitimate ones. Therefore, the grievances of terrorists should be addressed.