smstonypoint
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"Lurking variables?" Sir, this entire undertaking is fraught with uncertainty simply because geophysicists do not know which way is "up."
I know of this failing because the "north" end of a compass needle points to the North Magnetic Pole. We all know that in magnetic experiments opposites attract, yet we have north pointing north in direct contradiction of so-called scientific facts.
Now, adding to the inherent confusion is the idea that this experiment will be conducted "Down Under." Under what? You see?
Introducing "free-hand" variables to an already sloppy protocol, well garbage in, garbage out, is all I have to say.
Firstly, additional experiments should be conducted world-wide if Wagtail's results appear promising. Thus, the effects of the earth's magnetic field, latitude, longitude, and altitude could be investigated. However, we should not commit resources to that endeavor until our Antipodean colleague conducts his experiment.
Secondly, ignoring the natural variations in hammer-head speed and angle at incidence that occur in the real world is folly. Holding those items constant will not inform us of the properties of the "real-world" probability distributions of nails (bent versus unbent) and the angles assumed by the bent nails.
Thirdly (and most importantly), the video of the blind "free-hand" test would be of scientific interest in its own right.
Steve
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