What phrase is used as an equivalent to "soundness of mind" with respect to a testator?

Name: What phrase is used as an equivalent to "soundness of mind" with respect to a testator?
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Testamentary capacity refers to the legal and mental ability of a person to make or alter a valid will, which includes understanding the nature and extent of their property, the natural objects of their bounty, and the disposition they are making, essentially reflecting the soundness of mind required to do so.

What Phrase Is Used as an Equivalent to "Soundness of Mind