0 able to think clearly and be in control of and responsible for your actions:
She was very old but still compos mentis.
Well, we are still both compos mentis and we must try to bring our memories to bear on this topic.
He was compos mentis to that degree.
The person engaging in the conduct must also be "compos mentis" or in sound mind and of sober senses, not unconscious or intoxicated, for example.
Her brother by that time was "non compos mentis".
He had been diagnosed as "non compos mentis" by a doctor, and in his foggy netherworld the phrase was a matter of personal pride.
Will he be rendered non compos mentis?
Voluntary conduct entails no compulsion; the conduct must not have been reflex; the person must have been "compos mentis", or of sound mind and sober senses, not unconscious, intoxicated etcetera.
