Confirm is a type of Strengthen. Confirm is a type of Approve. Approve is a different concept from Decline. 
Direct is related to Boss. Boss is related to Commander. Commander is related to Captain. Captain is related to Sir. 
Strengthen <--IsA-- Confirm --IsA--> Approve <--DistinctFrom--> Decline 
Direct <--RelatedTo--> Boss <--RelatedTo--> Commander <--RelatedTo--> Captain <--RelatedTo--> Sir 