THE BIG POINT: Twelve-year-old Robin Lawrence (left) and 14-year-old Janice Snavely (right) give each other the credit while their coach, Rose Mary Dawson (center), is impartially pleased with both. But a pointed question could be raised as to whether it was Miss Lawrence's or Miss Snavely's point which accounted for the Ann Arbor Swim Club's team victory, 98-97 over Detroit Turners, in the State Women's Championships. Miss Lawrence picked up a surprise point in the 200-yard back stroke while Miss Snavely gained one in the 500-yard free style. Without their two points, the 96 gained by teammates wouldn't have been enough to bring the Hardy Trophy to Ann Arbor.