Undead Bloodline arcana and mindless undead

[Lawful GM]

The undead bloodline arcana allows among other things, for you to affect once-human undead with mind-affecting spells. This includes Ghouls, wights, vampires, ghosts etc. But what about basic human skeletons and zombies who have no Int? Does the mindless trump the bloodline arcana?

[Dasrak]

All undead are immune to mind-affecting spells, whether they have intelligence or not. This arcana explicitly states that corporeal undead that were once humanoids are vulnerable to your mind-affecting spells. There is no distinction for those with and without and intelligence score, so yes it works. This bloodline arcana explicitly trumps the immunity.

[Mojorat]

However it doesn't trump the individual wording of the spells. So stuff like hideous laughter still doesn't really work.