Does Adoptive Parentage effectively give you weapon proficiency?

[EmeraldEmpire]

Rules text for the alternate racial trait from Advanced Race Guide p72:

Quote:

Adoptive Parentage- Humans are sometimes orphaned and adopted by other races. Choose one humanoid race without the human subtype. You start play with that race's languages and gain that race's weapon familiarity racial trait (if any). If the race does not have weapon familiarity, you gain either Skill Focus or Weapon Focus as a bonus feat that is appropriate for that race instead. This racial trait replaces the bonus feat trait.

Quote:

Weapon Focus (Combat)

Choose one type of weapon. You can also choose unarmed strike or grapple (or ray, if you are a spellcaster) as your weapon for the purposes of this feat.

Prerequisites: Proficiency with selected weapon, base attack bonus +1.

Benefit: You gain a +1 bonus on all attack rolls you make using the selected weapon.

Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new type of weapon.

Let us suppose that the human chose a race that does not have the weapon familiarity trait and wanted Weapon Focus.

I see a few possible interpretations of how Adoptive Parentage could work, in order of ascending benefit to the human:

1) The human gets Weapon Focus, but not proficiency in the weapon. The weapon focus feat is completely useless until the human learns weapon proficiency (because weapon focus requires weapon proficiency as a prerequisite). If the weapon were an exotic weapon, then the human needs exotic weapon proficiency. If the weapon was normally a martial weapon, then the human needs martial weapon proficiency.

2) The human gets Weapon Focus, but not proficiency in the weapon. The weapon focus feat is completely useless until the human learns weapon proficiency (because weapon focus requires weapon proficiency as a prerequisite). If the weapon were an exotic weapon, then the human only needs martial weapon proficiency, because the trait makes the weapon a racially familiar weapon for them.

3) The human gets Weapon Focus, and proficiency in the weapon if the weapon would normally be a martial weapon, but not if the weapon would normally be an exotic weapon.

4) The human gets Weapon Focus, and proficiency in the weapon regardless of what the weapon would normally be (simple, martial, or exotic).

[RJGrady]

Being raised by dwarves doesn't make you proficient in the dwarven waraxe. I don't see why you would gain more benefit from being raised by a race with no weapon familiarity at all. 1) is almost certainly correct.

[wraithstrike]

If the weapon is an exotic weapon and a martial weapon he could take the martial or exotic version of the feat, and weapon focus would work either way, but he must use the weapon in the manner in which he is proficient with the weapon.

An an example if the human had weapon focus(bastard sword), and he only had the martial proficiency with it he would get the +1 to attack as long as he used it in two hands. Once he tries to use it in one he lose the +1 from weapon focus.

In short if you are proficient in the weapon you get the +1 from weapon focus as long as you use it in that manner.

PS:I know you can't use a two-handed weapon in one hand under normal circumstances, but I was just making a point.

[Are]

Since the ability doesn't say anything about not having to meet the prerequisites for the feat, you can only choose a weapon you are proficient with (likely through your class).