User blog comment:CircularBoat742/The Whole Fuss about Not a Loud/@comment-1650307-20171012043510

People simply will not shut up about this how "Lincoln is adopted" theory and ever since this episode and its plot has surfaced, it became more rampant.

Put simply, Lincoln Loud is not adopted and I do not think that anyone of the Loud siblings are adopted. If there has to be one to check off the "adopted kid" box because this show is all about checking the boxes of every known minority, then I would say maybe Lucy would be the one because of her black hair. But I think that every single offspring of Lynn Loud Sr. and Rita Loud are their actual biological children.