SANE

[adjective] -r, -st - having a healthy mind and not mentally ill, or showing good judgment and understandingIn the doctor's opinion he was sane at the time of the murder.(esp. humorous) The only thing which keeps me sane after a hard day in the office is jogging!She seemed a sane, well-balanced sort of person.It was a sane decision and one we all respected.(esp. humorous) No sane person would want to ride on the back of his motorbike!