When the narrator states that Dr. Tokai had displayed no signs of an unstable personality, what traits does he list as being absent within Dr. Tokai's personality?

As support for his claim that Dr. Tokai had shown no signs of having an unstable personality, the narrator states that Dr. Tokai was not a sore loser. He had displayed no problems with jealousy or inferiority complexes throughout his friendship with the narrator.