Assumption is a type of Acquisition. Acquisition is related to Buy. you would Buy because Better. Repair is a type of Better. 
Battle is related to Confrontation. Confrontation is a synonym of Encounter. Encounter is a synonym of Brush. 
Assumption --IsA--> Acquisition <--RelatedTo--> Buy --MotivatedByGoal--> Better <--IsA-- Repair 
Battle <--RelatedTo--> Confrontation <--Synonym--> Encounter <--Synonym--> Brush 