Excuse me if I add more clarification mixed with opinion.
1. Bajo, you answered ghost by saying:
" Exactly, only when you are a witness you give oak of truth. If you lie being a witness you commit falso testimonio. Other wise you are protected by art. 18 of Constitución Nacional. "Nobody might be forced to declare against him self", this is the defense right."
As pointed out, the US Constitution 5th amendment provides a person cannot be compelled to testify against himself. That appears to be the analog to Arg Constitution art. 18, but please don't tell me witnesses in Arg judicial proceedings are free to make stuff up. I assume that "falso testimonio" by a non-accused in a criminal (or civil) proceeding is a crime whether or not witnesses are administered oaths.
I would be amazed if "falso testimonio" were not a crime. Allowing a witness, any witness, to lie with impunity during a judicial proceeding strikes me as unjust and unwise. All witnesses in US judicial proceedings take an oath to tell the truth. Lying under oath in and out of court (to be distinguished from unintentionally telling an untruth) is perjury which is a felony punishable with imprisonment. The point is to take the sport out of the quest for truth and justice.
2. Bajo, you wrote:
" Stare decisis is inconstitutional because of a matter of judges Independence. According to check and balance politic system (
http://es.wikipedia.org/wiki/Separaci%C3%B3n_de_poderes) judges are independent from the executive and legislative powers (External independence). But they have independence from other judges too (internal independence). Even Supreme Court cases aren´t obligatory. A judge may disagree if he has new arguments. This is because the entire system is designed for rights protection against the State."
While the entire system may be designed for rights protection against the state, if I understand you correctly, it seems to be a horribly inefficient sytem subject to manipulation and ultimately making the law less protective. It is important for judges to be independent from the executive and legislative branches, but it makes no sense for them to be independent of each other and consequently free to rule in a haphazard manner in all types of judicial proceedings. Such built-in independence will not only result in a very counter-productive lack of predictability, but will breed corruption, favoritism, judge shopping and influence peddling of all kinds. (I now begin to have some insight into the the bizarre judicial maneuverings I read about in the BA Herald.)
In most US state and federal jurisdictions there are 3 levels of courts: initial trial court, intermediate appellate and highest appellate often aka Supreme Court. Many intermediate court and all Sup. Ct decisions are published in the official records of the court. They are widely available in daily legal journals, legal libraires and on line.
Stare decisis requires all trial court and intermediate court judges, consistent with their oath of office, to adjudicate in accordance with and to follow higher court rulings/precedents/decisions. That is analogous to the binding effect of the "plenario" decisions which you mention. By the way, many US intermediate appellate courts have the same kind of multi-judge hearings on unique or important cases. They are known as
en banc decisions and are usually made by 9 or 11 judges sitting in judgment instead of the normal 3 who sit on intermediate appellate panels.
Judges who consistently err or depart from precedent in bad faith may find themselves on the wrong end of an impeachment proceeding. Even Sup Ct judges are loathe to depart from their own earlier decisions, but will do so as social conditions and sound reasoning warrant. This allows the law to develop, to progress in order to reflect the social mores of the time.
This system also affords lawyers and judges alike the ability to make consistent rulings. Judge A will rule the same way as Judge B unless the facts of the case present some novel question or a new law has been implemented and it is still subject to some interpretation. WIthout meaning to sound jingoistic, I believe Arg society would be better served if the system of judical internal independence were revised.
What's the general opinion of the Arg lawyers on this subject?