Harry grinned wryly. "Amanda, you may not realise it, but when it comes to magical theory I’m a rank beginner. I didn’t study Arithmacy or Runes like Hermione and Luna. I might be better in a fight or at picking up practical magic but I completely suck at logic, the theory behind spell creation. Hermione is brilliant and Luna sees things no one else sees. If anyone can figure out a way to quantify and measure magic -to find a scientific equivalence- it’s those two."