Okay, so this question came up last time we played, does a spell have to be on a Witch's spell list in order for them to learn it from a scroll? My gut says yes but looking more closely into the matter there doesn't seem to be any restriction.
Spells Gained at a New Level: A witch's familiar learns a certain amount of lore and magic as the witch adventures. Whenever a witch gains a level, she may add two spells from the witch spell list to her familiar. The two free spells must be of spell levels she can cast.
Under the section about learning spells from scrolls it doesn't mention the part about the spell having to be a part of the Witch's spell list (At least none that I've been able to find).
A witch can use a scroll to teach her familiar a new spell. This process takes 1 hour per level of the spell to be learned, during which time the scroll is burned and its ashes used to create a special brew or powder that is consumed by the familiar. This process destroys the scroll. At the end of this time, the witch must make a Spellcraft check (DC 15 + spell level). If the check fails, the process went awry in some way and the spell is not learned, although the scroll is still consumed.
Doesn't mention anything about that new spell having to be on the Witch's spell list and there is no flat out rule like for wizards that strictly prohibits them learning spells from either spell list.
Wizards can add new spells to their spellbooks through several methods. A wizard can only learn new spells that belong to the wizard spell lists.
Thoughts?
^this^