Guntzviller v. Gitre

In Guntzviller v. Gitre, 195 Mich 695, 704-705; 162 NW 290 (1917), the Court stated: Instruments, testamentary in character or effect, disposing of property, are not to be set aside merely because the grantors or testators are old or weak, or foolish, or lack the average mental capacity of their neighbors or relatives. If they possess sufficient mentality to know and understand the transaction in which they are engaged, the extent and value of their property, those who are the natural objects of their bounty, are able to carry in their minds the general scope of the instrument and its effect, to whom they are giving and from whom withholding, they have the mental capacity to make such disposition, and if sufficient capacity exists it is not for the court to measure degrees of capacity or to indulge in comparison with other minds.