When Tierney was 2 years old, Linda took her to the pediatrician for her regular checkup. Besides being off the charts in her height, she was already smarter than some Kindergartners. Tier was entertaining the Dr. with stories and asking questions about her instruments. Linda remembers the Dr. calling Tierney precocious. At first Linda thought she meant precious, but asked her to repeat herself. The Dr. said it's when a child demonstrates very mature qualities at an early age. According to this old article, Linda should have treated her like an animal and not engaged her in any mental studies. Ooops, too late. Now look what happened! Tierney turned out super smart and successful because Linda encouraged her mental studies.