One interpretation could be that Gatsby refuses to accept that Daisy ever loved Tom because he sees himself as the only one who truly understands and loves Daisy. He believes that his love for Daisy is pure and that their connection is meant to be, while her marriage to Tom is a mistake. Additionally, Gatsby's obsession with Daisy and his desire to relive their past romance may cloud his judgment and prevent him from accepting any evidence that conflicts with his idealized vision of their relationship.