She didn't just lie about the age she lied about the conversation taking place at all. She tried to create the conversation from wishful thinking and her limited knowledge of the Quinlan case.
So did her husband. What's the point? Shouldn't both testimonies be scratched as personal opinion? Unless Greer can personally channel Satan himself, how could he read their minds to decide who's truthful?
I fail to see, in the article you provided, evidence that Mrs. Schindler lied.
Karen Quinlan died in 1985. Terry Schiavo was 22 when Quinlan died. There very well might have been a conversation between Terry and her mother about the Quinlan case when Terry was between 17 and 20 years of age, that is, between 1980 and 1983. Your assertion that the age/timing based on the Quinlan case proves Mrs. Schindler to be a liar is not warranted on this basis alone. Is there something else that causes you to assert that Mrs. Schindler is a liar?