What does " perfectly serviceable" mean? Please.. Mike Bowman then showed Guitierrez the picture that Tina had drawn. Guitierrez nodded. "I would accept this as a picture of a basilisk lizard," he said. "A few details are wrong, of course. The neck is much too long, and she has drawn the hind legs with only three toes instead of five. The tail is too thick, and raised too high. But otherwise this is a perfectly serviceable lizard of the kind we are talking about.“ What does " perfectly serviceable" mean? Please..