[Zope] finding out if a specific user / group has a specific permission

scenario: i am logged in as 'tav' and would like to know if 'Anonymous User' has permission to view the current object... i can find out if the current user has a specific permission: <dtml-if "AUTHENTICATED_USER.has_permission('xt_object view',this())"> but, this does, in no way tell me if an Anonymous User can... i would appreciate some guidance. thanks -- best regards, tav tav@espnow.com