Remarkable is a synonym of Unusual. Unusual is a synonym of Odd. Odd is a synonym of Strange. Strange is the opposite of Usual. 
Think requires Learn. you would Think because Remember. one thing you do when you Remember is Revelation. 
Remarkable <--Synonym--> Unusual <--Synonym--> Odd <--Synonym--> Strange <--Antonym--> Usual 
Learn <--HasPrerequisite-- Think --MotivatedByGoal--> Remember --HasSubevent--> Revelation 