Final answer:
Abraham Lincoln's mastery of using fine distinction in his speeches, as seen in his First Inaugural Address, can be considered a beneficial trait for a leader.
Step-by-step explanation:
Abraham Lincoln was indeed a master of using fine distinction in his speeches, as demonstrated in his First Inaugural Address on March 4, 1861. This trait can be considered beneficial for a leader. In his speech, Lincoln carefully balanced his approach towards slavery, assuring the southern states that he would not interfere with it where it already existed, but also affirming the Union's permanence and his commitment to maintaining federal power. By using fine distinction, Lincoln aimed to calm southern fears and bridge the divide between the North and the South.