I don't think you understand the legal defintion of mentally incompetence. By legal standards mental incompetence is the inability of a person to make or carry out important decisions regarding his or her affairs. An individual is defined as mentally incompetent if h/she is manifestly psychotic or otherwise of unsound mind, either consistently or sporadically, by reason of mental defect. Few examples of such mental defect are retardation, schizophrenia, and dementia.
http://definitions.u...l-incompetence/
The Tranquil, ironically, resemble sleepwalkers, never entirely awake nor asleep. They are still part of our Circle, however, and some might say they are the most critical part. They have incredible powers of concentration, for it is simply impossible to distract a Tranquil mage, and this makes them capable of becoming craftsmen of such skill that they rival even the adeptness of the dwarves. The Formari, the branch of the Circle devoted to item enchantment, is made up exclusively of Tranquil, and is the source of all the wealth that sustains our towers.
http://dragonage.wik...y:_The_Tranquil
Have you ever heard of a tranquil who refused to work for the Circle? I mean, they are no longer in danger of possession or harming others, they have no reason to stay. They could just as well go out in the world, go back to their families and become an artisan. Or fisherman. Or whatever else they want.
But not a single one of them does? Do you know why? Because they have no wants. No needs. They are -always- content. If you leave a newly created tranquil alone, they'll probably just sit there until they fall over dead.
They are incapable of making any decisions on their own. You have to give them rules to live by or they won't live long. They are probably highly suggestible at first because they don't care. It's all the same to them because... yep. They are always content.
That means they are basically slaves who can never rebel, never complain and will always do as told. Why wouldn't they? They are content anyway.
If that's not the case... then why would any tranquil stay with the Circles? I am pretty sure the majority was made tranquil against their will and they do retain their memories. Emotions and dreams are removed, leading to an increased concentration. They can still think logically though but not a single one of them refuses to work for the people who just mind raped them and betrayed their trust? I find that hard to believe.
Being made tranquil is not a mercy, it's despicable. legbamel just mentioned Karl... if being tranquil was so great, why did he beg for a mercy kill when he got his emotions back temporarily?