Iona wrote her will. The following year, she wrote another will that expressly revoked the earlier will. Later, while cleaning house, she came across the second will. She mistakenly thought that it was the first will and tore it up because the first will had been revoked. Iona died shortly thereafter. The beneficiaries named in the second will claimed that the second will should be probated. The beneficiaries named in the first will claimed that the second will had been revoked when it was torn up. Had the second will been revoked?