Terrific is similar to Intense. Intense is similar to Thick. Thick is the opposite of Intelligent. 
Person wants (to) Perfect. Perfect is a synonym of Expert. Observer is a type of Expert. 
Terrific <--SimilarTo--> Intense <--SimilarTo--> Thick <--Antonym--> Intelligent 
Person --Desires--> Perfect <--Synonym--> Expert <--IsA-- Observer 