I'm wondering about Salvor Hardin's mentalic powers, too. In the books, the Second Foundation has mentalic powers and psychohistory, the First Foundation has physical technology and (eventually) visible power. Salvor Hardin in the book knew a little bit about psychohistory, it looks like in the series she has a bit of mentalic powers instead. But what if those two aren't entirely separate things? What if mentalic powers make it easier for people to understand psychohistory in an intuitive way, or if an understanding of the maths underlying psychohistory can somehow unlock mentalic powers in some people? Then it would make a lot of sense for the Second Foundation to have both.
I'm not even sure there are going to be two Foundations in the series. Terminus has at least one person with metalic powers and the Prime Radiant with all the psychohistory equations. It will be rather interesting if in the series there is only one Foundation and Arcadia's idea about the Second Foundation (they live among the First Foundation) is what's actually happening.
Even if there are two Foundations in the series, in the books there were some Second Foundationers living in the First Foundation at least at one point, so there is no rule in the Seldon Plan against that. And I don't see why there would be a rule against any of those Second Foundationers being psychohistorians. The rule, if anything, would be that psychohistorians don't teach openly about psychohistory outside of the Second Foundation.
I'm wondering about Salvor Hardin's mentalic powers, too. In the books, the Second Foundation has mentalic powers and psychohistory, the First Foundation has physical technology and (eventually) visible power. Salvor Hardin in the book knew a little bit about psychohistory, it looks like in the series she has a bit of mentalic powers instead. But what if those two aren't entirely separate things? What if mentalic powers make it easier for people to understand psychohistory in an intuitive way, or if an understanding of the maths underlying psychohistory can somehow unlock mentalic powers in some people? Then it would make a lot of sense for the Second Foundation to have both.
I'm not even sure there are going to be two Foundations in the series. Terminus has at least one person with metalic powers and the Prime Radiant with all the psychohistory equations. It will be rather interesting if in the series there is only one Foundation and Arcadia's idea about the Second Foundation (they live among the First Foundation) is what's actually happening.
Even if there are two Foundations in the series, in the books there were some Second Foundationers living in the First Foundation at least at one point, so there is no rule in the Seldon Plan against that. And I don't see why there would be a rule against any of those Second Foundationers being psychohistorians. The rule, if anything, would be that psychohistorians don't teach openly about psychohistory outside of the Second Foundation.