Fray - there are two horses running in the same race. Neither has any prior form (it's a novices' race). You have to back one, and only one.
You ask each jockey all about each horse, and get the same answers in each case, except that the jockey of one mentions it has had asthma attacks in the past - remember it's never raced, so no-one knows what will happen under these conditions.
Which one do you back?
Aunty Betty is going to be putting £millions on each of her trainee pilots. Explain why she should back a runner that has known medical faults, when there is a queue down the corridor of wannabees who are 100% fit.