Marion Peterson executed a will that contained a bequest to Vasta Lucas in the form of a trust. On Lucas's death, the trustee was to distribute the assets to four beneficiaries, including Peterson's brother and sister. Arvin and Carolyn. Later, without witnesses. Peterson crossed out the beneficiaries names, but she left the bequest to Lucas intact. After Peterson's death. Arvin and Carolyn contended that the will had been completely revoked. Were they correct? Explain.