In the SH4 forum there are some excellent posts that explain this sort of stuff so that even I can understand it.
These may help
https://maritime.org/doc/index.php#sub
https://www.mathscinotes.com/2011/03...museum-docent/
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abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.
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