Reasonable is a synonym of Rational. Rational is related to Reason. 
Addition is related to Figure. Figure is related to God. God is the Truth. Truth is a synonym of Accuracy. 
Reasonable <--Synonym--> Rational <--RelatedTo--> Reason 
Addition <--RelatedTo--> Figure <--RelatedTo--> God --DefinedAs--> Truth <--Synonym--> Accuracy 