we can't be 100% sure of this because an arsonist can keep dousing people and THEN ignite.
And considering someone got doused tonight (i think it was blade.. sry i can't get back in previous pages because chrome crashes, but i think blade said he got doused).
Arsonist probably just doused another target until they can ignite.
Depending on the mod or setup, some allow the person to ignite and douse simultaenously but only after the second night in a row of dousing, but the USUAL ruling is that the actions are mutually exclusive, so they try to douse many ppl before rice-crispying the whole lot at the same time...
So you might have your opinion if you believe there's a fireman... but WE do not know that.