Having persuasive reasoning in support of your legal conclusions.
"What can be asserted without evidence can be dismissed without evidence." Christopher Hitchens.
Don't emote or assert. Reason!
When you read judicial opinions, don't just look for the "rule" and think your work is done. Read and re-read cases until you master them, until you have critically analyzed the court's reasoning and fully understand the arguments of both sides. You may have to read a case 4 or 5 times before you master it.
