Just as the argument from fine-tuning for design, the argument from fine-tuning for the multiverse must come to terms with the problem that the existence of life is old evidence for us. If one applies Howson’s ur-probability solution to it, one must consistently interpret all the probabilities in equation \(\eqref{simplemult}\) as assigned from the perspective of a counterfactual epistemic agent who is unaware of her/his own existence. At least prima facie, it is unclear what background knowledg