User blog comment:Kaido King of the Beasts/Chapter 867: Suns and Daughters/@comment-910220-20170602010636/@comment-29325824-20170603165955

While I also think that it's not possible, the wording of Oda's answer (at least the translated version) does not really deny the claim so much as be vague about it. So perhaps it really is possible to gain a DF by eating its current user.

Or perhaps its something specific to either Linlin or the Soru Soru no Mi?