And all of these issues around assigning 0-level skills are ultimately why I decided there's a "Traveller Uncertainty Principle" around skills: once you start down the path of "X number of 0-level skills" you will inevitably leave some out. This is why I've opted for the homeworld + prior career = some undefined set of "things your character can do or knows" (I hesitate to even call them "skills", since they can apply to any type of throw). For CT this makes sense to me, but realize this may not make sense for MT on, where skills/term and the skill lists expanded greatly.