The difference between the VAP and VEP is lower as there are nations where registration is automatic and mandatory. In these cases, the figures have little disparity. An interesting point is that some countries actually have a larger VEP than VAP.
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Answer is social contract
I think The Mathematical Jewel (1585) was his most popular and influential publication. The “Jewel” of the title was an astrolabe designed by Blagrave and considered superior for its time. The title page (shown above) proclaims the book’s contents:
The mathematical ievvel, shewing the making, and most excellent vse of a singuler instrument so called: in that it performeth with wonderfull dexteritie, whatsoeuer is to be done, either by quadrant, ship, circle, cylinder, ring, dyall, horoscope, astrolabe, sphere, globe, or any such like heretofore deuised: ...
Ethics is something people learn every time and it differs differently on each person based on how they where raised. The focus on "administering justice" has a guide on how to properly do so. Officers and other judicial officials do not go into the job doing what they think is correct, they do what the books, laws, and policies say.