Adjective Satellite
of sound mind, memory, and understanding; in law, competent to go to trial
Source: WordNetThe soldiers stumbled forward doggedly, cursing the bite of the wind while reminding one another that generals are seldom of sound mind and unbesmirched ancestry. They would not be generals if they were. Glen Cook
It is in vain that a man of sound mind and cool temper understands the condition of such a wretched being... He can no more communicate his own wisdom to him than a healthy man can instil his strength into the invalid by whose bedside he is seated. Johann Wolfgang von Goethe
Agathias Scholasticus of Myrina described him thus: “He was a man of sound mind, and clever at adapting himself to the times. Source: Internet
Although typically used in law, this term can also be used metaphorically or figuratively; e.g. when one is in a confused state, intoxicated, or not of sound mind. Source: Internet
It allowed for the death of any person of at least ten years of age who suffered from an ailment that would prove fatal and cause extreme pain, should they be of sound mind and express a desire to artificially hasten their death. Source: Internet