This is the crux of the Fundamental Theorem of Calculus. The crux, or the hardest section, consists of a Font 8B boulder problem. The crux of the problem is how to create it. This tiny value is the crux of the flatness problem. Thucydides altered these speeches in order to elucidate better the crux of the argument presented. Wright views Baby's moral shift as the thematic crux of the film. How these confusions resolve forms the crux of the story. Royer is sometimes wrongly cited as initially distinguishing Crux. It travels down the right coronary sulcus, towards the crux of the heart. What happens to them forms the crux of the story. Another is the asterism of the Southern Cross, whose recognised constellation is Crux. How he resolves the fight and marries his love forms the crux of the story. All that forms the crux of the story. The events that follow form the crux of the story. The concept of involvement is the crux of SJT.