Does Weapon Focus from a resonant opalescent white pyramid ioun stone count as prerequisite?

[Warhawx]

Does Weapon Focus from a resonant opalescent white pyramid ioun stone count as prerequisite for other feats?

[Dasrak]

Yes, although you would lose the benefit of any feats that required that prerequisite if you removed the ioun stone.

[Kudaku]

I believe the answer is yes, but if you lose the ioun stone then whatever options the item let you qualify for is "non-functional" until you regain it.

[Cap. Darling]

What they said.