Fiona wasn't too confident in answering but she was willing to try so she raised her hand. "Spell accuracy is like a recipe. You need to have all the right techniques in order to successfully cast your spell. If that doesn't happen, it can lead to....possible injury to yourself or someone else."

Fiona felt pretty satisfied with her answer but what would her Charms teacher/Head of House think? Honestly, she wasn't fussed either way.