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Lord Kelvin's Dictum

  1. Nov 27, 2015 #1
    The other day, in conversation, I attributed the dictum, "If you can't measure it, it isn't real!" to Lord Kelvin. However, when I chanced to look it up in Wiki, I could find no confirmation of this attribution. Was I mistaken? Did Lord Kelvin ever say anything to this effect? If not, is there some other source?
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  3. Nov 28, 2015 #2

    Stephen Tashi

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