Amor.
Por mais que eu odeie dizer isso, a resposta é que ele não tem nenhuma conexão emocional com seu laptop, o que significa que ele não pode encontrá-lo ou influenciá-lo. Note que ele também descarta escrever uma mensagem nos livros ou, de alguma forma, mexer com a sonda.
“‘They’d have access to infinite time, infinite space,” he told Tars, gesturing all around him. “But no way to find what they need. But I can find Murph and find a way to tell her—like I found this moment…”
“How?” Tars asked.
“Love, Tars,” he said. “Love, just like Brand said. That’s how we find things here.” Love, like gravity, which could move across time and dimensions.
Brand had been spot on.
“So what are we to do?” Tars asked.
Cooper looked down the time dimension. The books? No, and not the lander. But the watch, on the shelf, as far as he could see…
“The watch,” he realized. “That’s it. She’ll come back for it.” - Interstellar Novelisation