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In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements. For example, in the conditional statement : "If P then Q ", Q is necessary for P , because the truth of Q is guaranteed by the truth of P .
If the ordinary minister is absent or impeded, a catechist or some other person deputed to this office by the local Ordinary, may lawfully confer baptism; indeed, in a case of necessity, any person who has the requisite intention may do so (canon 861 §2), even a non-Catholic or a non-Christian. [8] [9]
Necessary and sufficient condition, in logic, something that is a required condition for something else to be the case; Necessary proposition, in logic, a statement about facts that is either unassailably true (tautology) or obviously false (contradiction) Metaphysical necessity, in philosophy, a truth which is true in all possible worlds
In English law, the defence of necessity recognises that there may be situations of such overwhelming urgency that a person must be allowed to respond by breaking the law. There have been very few cases in which the defence of necessity has succeeded, and in general terms there are very few situations where such a defence could even be ...
It is "an exception from illegality and in certain cases even as an exception from responsibility." In order to invoke the doctrine of necessity: [5] The invoking State must not have contributed to the state of necessity, Actions taken were the only way to safeguard an essential interest from grave and impending danger.
Opinio juris sive necessitatis ("an opinion of law or necessity") also simply opinio juris ("an opinion of law") is the belief that an action was carried out as a legal obligation. This is in contrast to an action resulting from cognitive reaction or behaviors habitual to an individual.
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Emergency law/right (nødret, nødrett) is the equivalent of necessity in Denmark and Norway.[1] [2] It is considered related to but separate from self-defence.Common legal examples of necessity includes: breaking windows and other objects in order to escape a fire, commandeering a vehicle to serve as an emergency ambulance, ignoring traffic rules while rushing a dying patient to a hospital ...