As I was feeding the Buddy Boy his dinner the other night, his sister looks at him and says "Buddy Boy, you have dinner on your nose!"
And even though he's only 9 months, he looked straight at her and said "NO"
Not that it was intentional, and that he knew what he was doing.... it was just the right sound & attitude at the right time. And then he couldn't figure out why we were both laughing at him!!!