User blog comment:Vulture345/Do You think Lincoln is Adopted?/@comment-25600892-20170306182105

There are a few things to back up that he's adopted:
 * He doesn't seem to have inherited any of his parents' traits (ex: Leni inherited Lynn Sr.'s fear of spiders).
 * It was revealed in The Whole Picture that he has had his white hair white hair since he was a baby, contradicting that Chris Savino implied that his hair has not always been white.