Lucidity
Lucidity was a state of clear organized thought, as opposed to insanity, hysteria, and delirium.

In 2267, James T. Kirk notified a nurse that if Robert Johnson and Elaine Johnson's lucidity returned, she could find him in the briefing room. ()

In 2372, The Doctor cautioned Kathryn Janeway that a mutating Tom Paris wavered between lucidity and derangement. ()

In 2374, Tim Watters described Captain 's initial condition as injured, but lucid, refusing to head to the 's sickbay. ()

See also
 Consciousness
 Lucid dream

Psychology