Assertion: infallibility's definition | /r/HasProperty | given in the oxford english dictionary
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Source sentences:
text: With reference to your question about the "ether", the various definitions of this word as given in the Oxford English Dictionary all refer to a physical reality, for instance, "an element", "a substance", "a medium", all of which imply a physical and objective reality and, as you say, this was the concept posited by nineteenth century scientists to explain the propagation of light waves.