A testator with a large and complex estate need not recall every individual asset to demonstrate testamentary capacity, particularly where the estate is to be dealt with as a whole without specific gifts. Video recording of the will-making process provides significant evidence supporting both capacity and knowledge and approval. Where competing expert diagnoses exist (dementia vs resolved depression with psychotic features), the evidence of the clinician who examined the patient is likely to be preferred. Knowledge and approval of the effect of a will does not require proof that the testator understood the quantum of gifts in dollar terms; awareness of a very substantial estate and the method of apportionment is sufficient.
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