There was the following passage in New York Time’s (May 17) article describing the scene of Sandy Bem, a Cornell psychology professor getting diagnosis of whether she has the sign of Alzheimer’s or not by a neuropsychologist. She chose euthanasia to confront the progressive decay of her self-identity due to Alzheimer’s in the end:
“He (doctor) read her a list of words and had her recall as many as she could. He gave her two numbers and two letters and asked her to rearrange them in a particular order: low letter, high letter, low number, high number.” - The New York Times
I know lower case letters and upper case letters, but I’ve never heard of ‘low letter’ and ‘high letter.’
I searched the meanings of ‘low letter’ and ‘high letter’ on Google, but found no source telling the definition. What do they mean?
Up
for metaphoric use. It's just an example of bad writing (or possibly bad science, if the article was using the same phrasing as the doctor).