After nearly 40 years of marriage, Frank Honigman executed a new will that left his wife only the minimum required by law. The balance went to his brothers and sisters (the couple had no children). For some time before his death, Honigman had repeatedly told both friends and strangers, using obscene and abusive language, that his wife was unfaithful. Honigman was normal and rational in other respects but, by all evidence, his suspicions were untrue. They were based on such evidence as the fact that, when he left the house, his wife would ask him when he planned to return. Also, whenever the telephone rang, Mrs. Honigman answered it. For the last two years of his life he positively forbade her to answer the telephone. Is Mr. Honigman’s will valid?