We are pretty sure today’s screenshot does not really require an explanation:
The CSP will enable the player to persuade certain NPCs in order to obtain stuff like pieces of information, free training or maybe even a higher reward for a quest. But wait, there’s more: everyone who learns this perk might even stumble upon some quests that less eloquent heroes would miss.
As we can’t create new perks, but just alter the old ones, we decided to use the perk “Bargaining”. Therefore, everyone who learns the perk “Silver tongue” will not only be able to persuade NPCs, but also gain the trading advantage of the original perk.
Oh, and whether you believe it or not: we actually had this idea before and independently from Risen 2 (although we admit that we shamelessly copied the name).