She met the Texas legal standard of sanity because of exactly that.
Has anyone ever seen an explanation about why Dietz testified to the existence of a non-existent episode of Law & Order? And why, pray tell, would anyone want to hear testimony from him AGAIN, since he proved so completely unreliable in the first trial?
Personally, I think our legal system is not much saner than Andrea Yates. Why the he!! are Texas taxpayers footing the bill for not one, but TWO exhaustive beating-a-dead-horse trials seeking to determine if this utterly insane woman "meets the Texas legal definition of insanity"? Who the he!! CARES? She is obviously profoundly mentally ill and has been for many, many years, and is a danger to herself and others, and must never be let out of a secure psych hospital. The colossal amounts of money being spent on this idiotic debate over how many angels can dance on the head of a pin, would be MUCH better spent on efforts to prevent such incidents.