How did Heinlein decide to explore telepathy as a key part of the story?
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Time for the Stars

Time for the Stars
La discussion entre lecteurs est ouverte maintenant. Il s’agit d’une discussion communautaire.
How did Heinlein decide to explore telepathy as a key part of the story?
Did anyone else feel the story's pacing slowed down during the training sequences?
What about the setting of the space voyage felt most realistic or believable?