This phrase — the 'fingernail test' — was the emotional and philosophical core of Nyad's speech. She traced it to a pivotal moment at age 17, when she was about to swim the 100-meter backstroke at the Olympic Trials for the 1968 Mexico City games. Standing on the pool deck in a fog of pressure, a 17-year-old friend named Suzanne shook her and pointed to the tiny half-moon sliver of her pinky fingernail. Suzanne told her: swim the most perfect race you've got, touch the wall, and don't look at the scoreboard. If you can say sincerely 'I couldn't have done it a fingernail faster,' then it'll all be all right, no matter what. Nyad blasted off, touched the wall, and finished sixth — she didn't make the Olympics. But the tears never came, because she knew she had given everything. Nyad carried this philosophy through her entire life. When she walked up on the beach in Key West after swimming 110 miles from Cuba at age 64, she asked herself the fingernail question again and answered it sincerely. The fingernail test became her way of measuring a life: not by outcomes but by the completeness of effort. On your last day, she told the graduates, 'what a goal it would be to say that you did all of it so that you just can't do it even a fingernail better.'