Quote Originally Posted by Bijo
To me all that counts regarding being just is proper (independant) investigation, proper judgment, sound reasoning, logic / argumentation, facts, proper morality, and so on.

If we are speaking of the law this would have to be applied to it as well. Meaning: no need for lawyers nor juries, etc. (if there.) Investigate fairly and judge properly. Those who cannot judge properly, apply sound reasoning, be fair, or anything else required, should not be in the position to judge or to have any say at all in the outcome. Logic, clear minds, and the likes, including all that is just, should dictate justice, the law.
The problem with that is proper morality.
The justice system should strive to be amoral at all times.
Lawyers are at all times needed in order for all parties to speak with eloquence in regards to the law.

Jury's are also needed, especially in cases where the relevence of a certain sector of modern society is paramount to either the case as a whole, the defence or the prosecution. It adds empathy to Law in cases which need it most.