Stranger cannot Know. Forgive requires Know. 
Day is a type of Opportunity. Day is a different concept from Second. Second is a type of Support. Support is related to Anonymous. 
Stranger --NotCapableOf--> Know <--HasPrerequisite-- Forgive 
Opportunity <--IsA-- Day <--DistinctFrom--> Second --IsA--> Support <--RelatedTo--> Anonymous 