“This threatens to become a circular argument,” Holmes said. “I know it’s there because it’s all that explains the facts. My wife tells me that astronomers posit the existence of an invisible planet by the effects it has on the orbit of other celestial bodies. Thus do I posit the existence of this object.”

“This threatens to become a circular argument,” Holmes said. “I know it’s there because it’s all that explains the facts. My wife tells me that astronomers posit the existence of an invisible planet by the effects it has on the orbit of other celestial bodies. Thus do I posit the existence of this object.”

— Laurie R. King