I've looked up Splinter of the Mind's Eye. I discovered two facts about it.
1. It's not canon; but not only that, it was commissioned as a novelisation of a story that would be a low budget sequel to Star Wars (A New Hope) should the latter not bring in the readies for a worthy, big budget sequel. So, before any myths circulate that there's a canonical novel where the siblings innocently get cosy before they found out about their shared parentage; no, there isn't. In that 'reality', Luke and Leia aren't siblings.
2.The novel is written by Alan Dean Foster, who also novelized the first three Alien movies. I read those and hate his writing style. As a result, I won't be reading his Star Wars inspired material.
K .. thanks. So the trooper recruitment process was clearly handled differently by successive management in this story arc.
.. and I can't resist re posting this scene from Clerks shot back when Kevin Smith was one of the only people who still gave a shit about Star Wars back before episodes 1, 2 and 3 were even announced (Lucas gave him permission to marry at Skywalker Ranch just after A Phantom Menace was revealed to the world and also gave him a private screening of the trailer before it was made public .. respect)