Most RPGs are predicated on the 50% success rule. Heroes will succeed half the time they attempt a task. Fate Core takes a quantitatively different approach by predicating on the 100% success rule. Heroes are equal to any task which they attempt to undertake. The static skills test throws the differences between the two approaches into stark contrast and highlights the effectiveness of each.
Internal conflict within the plot comes from diametrically opposing forces influencing a character’s choices. These forces are: what the character desires to do, what others desire the character to do, what is morally right to do, and the action ultimately taken. In a perfect, conflict-free world all of these choices would be identical and characters would make the right choices every time. This might lead to a harmonious world, but it makes for pretty poor drama. Drama results from the effort to bring these forces into alignment.