Just to clarify, I found this at Hoagies:

"Therefore, it is recommended that any time a child scores within the ceiling range on three or more subtests of the WISC-R, the Stanford-Binet Fourth Edition, or the Kaufman Assessment Battery for Children, the child be retested with the Stanford-Binet Form L-M (Silverman & Kearney, in preparation)."

How do you know what is "within the ceiling range"?

She thought she could, so she did.