This is the very difficult part: people adept at manipulation tend to be highly intelligent. Simply spending time with a good manipulator is dangerous. The only

This is the very difficult part: people adept at manipulation tend to be highly intelligent. Simply spending time with a good manipulator is dangerous. The only good metric I know here is the old saying "the key purpose of an education is to be able to recognize one in others." Good communicators also sort out weasels via their lack of distinct language and similar tells.