Knocking on wood was about knocking on unpainted wood, so that you have actual direct physical contact with wood. Remote knocking seems to go in the other direction...
> Knocking on wood was about knocking on unpainted wood, so that you have actual direct physical contact with wood.
How do you know this? For example, there is a wikipedia page section entitled "Origin of use in the English language"...
https://en.wikipedia.org/wiki/Knocking_on_wood#Origin_of_use...
but the contents of that section make it extremely clear that no relevant facts are known to wikipedia.
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