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necessary

1. Logic
a. (of a statement, formula, etc.) true under all interpretations or in all possible circumstances
b. (of a proposition) determined to be true by its meaning, so that its denial would be self-contradictory
c. (of a property) essential, so that without it its subject would not be the entity it is
d. (of an inference) always yielding a true conclusion when its premises are true; valid
e. (of a condition) entailed by the truth of some statement or the obtaining of some state of affairs
2. Philosophy (in a nonlogical sense) expressing a law of nature, so that if it is in this sense necessary that all As are B, even although it is not contradictory to conceive of an A which is not B, we are licensed to infer that if something were an A it would have to be B
References in periodicals archive ?
Second, since necessarily true propositions are true in every possible world W*, and the possibility of rationally denying a proposition p requires that a possible world W is conceivable in which not-p is true, only necessarily true propositions satisfy the criterion mentioned.
In the ever-changing world of risk management, that would represent another important cyclical change--though not necessarily a permanent one.
Validity does not necessarily predict clinical relevance, but it is certainly important to understand whether reported information is believable before deciding whether to rely upon it for changes in clinical management.
Expansion of the medical workforce does not necessarily result in an efficient or equitable distribution of doctors, geographically or in terms of specialty, say Dr.
UBI rules: While the IRA exception can be positive for banks considering an S election, it is not necessarily positive for IRAs.
The CHP, according to Hahn, stated then and continues to say that increased speed does not necessarily translate into increased traffic fatalities.
It ain't necessarily so" that memorable line from the opera Porgy and Bess should sum up what educators, booksellers and consumers are saying about the National Endowment for the Arts (NEA)'s 2004 study warning that Americans are reading less "literature" a trend that poses a threat to civil society.
This is all to say that interfaith struggles are necessarily implicated in politics and must ultimately take a political stand in order to be effective.
Thus, the larger size of a cohort may not necessarily increase its power to detect genetic or environmental contributors to complex diseases.
For an administrative expense to be deductible under IRC section 2053, it must be (a) incurred in the administration of the decedent's estate, (b) actually and necessarily incurred and (c) allowable by the laws of the jurisdiction under which the estate is being administered.
If, as his title suggests, Attie wants to connect his pictures to this deplorable situation, he ought to do more to acknowledge nuances in the structure of racial and ethnic difference: To put it simply, anti-Semitism does not necessarily equal racism, no more than asserting the longtime presence of Jews necessarily relates new immigrants' plight to theirs.
This brief review will necessarily focus on a few highlights as the author sees them, and he begs forgiveness in advance for passing over so many other worthwhile contributions.