(Of course, as indicated above, the possibility theorist can copy ranking theory by taking necessity measures as primitive and by adopting a well-ordered range).
There is prima facie violation of extensionality which can, however, be avoided by taking necessity to apply to sentences; some philosophers have claimed that there is a de re sense of necessity which does not lead to even prima facie violations of extensionality.
(If we take necessity measures as primitive rather than letting them be induced by possibility measures, and if we continue to follow the rank-theoretic policy of adopting a well-ordered range, we can obviously also define countably and completely minimitive necessity measures).
It's interesting to watch "The Fantasticks" become a favorite in regional theater, because it takes, by necessity, the opposite path of most New York musicals that travel.
This project takes functional necessities like water infrastructure and coopts them to provide public recreational space in Mexico City.
The Founding Fathers took the necessity of balancing the federal budget to be self-evident – with no need to mandate it because economic circumstances severely constrained the government's ability to spend more than taxes covered.
While such sentiments are common along the border, they are a striking counterpoint to discussions of immigration reform in Congress that take the necessity of enforced border security and hundreds of miles of hard fencing for granted.
Ever since Sept. 11, the Bush administration has taken the necessity of heightened vigilance against terrorism and turned it into a rationale for an extraordinarily powerful executive branch, exempt from the normal checks and balances of our system of government.
In the typical graduate school, even monetary economists take the necessity of a central bank for granted.
Obviously, this methodological necessity takes certain liberties with the interpretation of "OT".
