It probably depends on the distinctiveness of the song, how used you are to it and how many other songs you know with a similar start. I only knew that one son

It probably depends on the distinctiveness of the song, how used you are to it and how many other songs you know with a similar start. I only knew that one song that starts with that drum beat, so to me, it could not have been anything else. But if you are familiar with a wider selection of songs, the chance of multiple matches (and hence wrong answers) is higher.