It's beyond their mental capacity.

- The alteration to your mental capacity...

- Objection. - She lacked the mental capacity perhaps...

(b) Is declared an invalid because of diminished mental capacity;

What about a neuroendocrine tumor? Not without diminished mental capacity,

Not without diminished mental capacity, loss of judgment.

(c) If one of the persons is declared an invalid because of diminished mental capacity;

Supposedly, the man had, like, a mental capacity of a five-year-old.

I mean, he has the mental capacity of a nine-year-old.

You... Trust me, they have the mental capacity of field mice.