Identical proficiencies from multiple sources in Game Development Posted May 4, 2020 · Edited May 6, 2020 by shadowmyre Default 5E standpoint: "If a character would gain the same proficiency from two different sources, he or she can choose a different proficiency of the same kind (skill or tool) instead." (PHB 10th printing, p125) It would make sense for that rule to be carried over. However, since SG-1 isn't D&D, the developers will need to explicitly state it. Overall, more skill choice for the classes is probably a good idea. Give them a core skill or two, then 'chose one/two from (list)' feels balanced.