I don't think George was a passive nature. In the early Beatles days (listen to interviews) he was quite talkative. But he soon grew tired of the interviews and Beatlemania and put on his morose face. There is no proof that George had the amount of songs in 63/64 that John and Paul (whether as a team or alone, I really don't give a f*** anymore) provided. And surely, if You Know What To Do was the best thing he could come up with, it wasn't really worth it. If he had come up with a really splendid song, I'm pretty sure George Martin would have picked it up. And I pretty sure too about the idea that George Martin could detect a good song, even if it was only played on a guitar. George just did not have such a song in 63/64. I'm sorry for all you George lovers and yes, he provided great songs in the last few years, but he just had no good song in the early days.