It seemed to me thatKrO2 wrote:Jorpho wrote:- More importantly, how exactly did Legimens turn into a substitute for Imperius? It has come up twice now. It makes no sense to me.
"Welp, it's Tuesday. Time for my morning bank robbery."
If you want to restrict it to literal Legilimency, then you're limited to finding out under what circumstances this person would do something, and then convincing them through normal means that those circumstances are real. But I think Harry was referring to mind magic in general.
You could get pretty much anyone to do pretty much anything by controlling what they remember. Any conceivable moral justification for the act, you could make them think it's real. (And of course, you use Legilimency to find what would convince them.) You could even give them a fake memory of having thought about doing what you want them to do and deciding in favor for reasons X, Y, and Z. Don't have to be good reasons, or even reasons that apply. You can make them remember believing that they should do it. Or, of course, you could have them remember finding out that the person you want them to murder is secretly Voldemort and only they can kill him because there's a prophecy or something. You could give them clear memories of being told ever since they were very young that anyone who uses the code word "adverb" must be trusted absolutely, or just remove all memories of them suspecting you. You could make them believe that Wizarding society is hopelessly corrupt and evil and needs to be optimized.
(I may have had a dream recently in which I lost to a smart Voldemort despite being omnipotent.)
Considering how powerful false memories would be, as you say, it would seem Imperius would be downright redundant – but then, the point that memory-charms should be just as unforgivable has been made muliple times.