"The laws of physics and chemistry must be the same in a crucible as in the larger laboratory of Nature."

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If everything in chemistry is explained in a satisfactory manner without the help of phlogiston, it is by that reason alone infinitely probable that the principle does not exist; that it is a hypothetical body, a gratuitous supposition; indeed, it is in the principles of good logic, not to multiply bodies without necessity.

— Antoine Lavoisier