All creatures have two parents
I do not allow anecdotes to be mistaken for universal laws, nor do I let biographical peculiarities cloud reason. If I did, I would give advice like:
Don’t have children with someone very different from you, because if the child closely resembles a parent who dies prematurely, his life in the hands of the surviving parent will be doomed.
And I never give that sort of advice.
Now I think about how Doyle hated Sherlock Holmes to the point of trying to kill him, how Cervantes made eternal and universal ridicule of Don Quixote, and I think that creatures do not just have one father, but a father and a mother.