}}</ref>|group=note}}, and [[Lord Kelvin|William Kelvin]] distinguished between primary and [[Natural causes|secondary (''natural'') causes]]. A ''primary cause'' was meant to be a ''first cause'' to explain singularities.<ref name="skeptics">{{Cite book
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}}</ref>|group=note}}, and [[Lord Kelvin|William Kelvin]] distinguished between primary and [[Natural causes|secondary (''natural'') causes]].{{#tag:ref|Adherents of [[Methodological naturalism|methodological naturalism]] such as E.J.Larson often mistakenly portray these scientists as "freely mix[ing] matters of supernatural and natural causation" without recognizing the real difference they made between primary and secondary (natural) causes.<ref>{{cite book
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|author=Edward J.Larson
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|title=Evolution:The remarkable history of a scientific theory
|quote=Indeed, Isaac Newton, Johannes Kepler, William Gilbert, John Ray, and many other prior scientific luminaries freely mixed matters of supernatural and natural causation.}}</ref>|group=note}} A ''primary cause'' was meant to be a ''first cause'' to explain singularities.<ref name="skeptics">{{Cite book