According to the Core book (p.122) if you take Brawl as a Favoured ability Martial Arts also becomes Favoured. All Favoured abilities must start with at least 1 dot.
However, Martial Arts has a special rule (p.154) that you need to take the Martial Artist Merit to purchase dots in it.
So, what happens if I want to make a brawler character without martial arts training at character creation? Then what happens if during play the character picks up the merit?