Because in RL you aren't allowed to ask people.
How did your dc score on the CATS in the year or two preceding the 11+?
I live just out of a grammar school area so in order for my dd to get a place she can't just scrape a pass she has to get stellar marks (she does not know this)
A friend told me that her (private) school had said if your child doesn't score over 85% to forget grammar.
So what are people's experiences with the CATS and actual 11+ success?
I hate this system.