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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 classic literature ?
And the desire which goes beyond this, or more delicate food, or other luxuries, which might generally be got rid of, if controlled and trained in youth, and is hurtful to the body, and hurtful to the soul in the pursuit of wisdom and virtue, may be rightly called unnecessary?
And the drone of whom we spoke was he who was surfeited in pleasures and desires of this sort, and was the slave of the unnecessary desires, whereas he who was subject o the necessary only was miserly and oligarchical?
Addressing a press conference in Karachi, Ishaq Khan, the LPG distributor action committee member said that police have launched an unnecessary crackdown against distributors from last 10 days.
Addressing a press conference, Ishaq Khan, member of the distributor action committee, said for the last 10 days, police have launched an unnecessary crackdown against distributors.
Khateer Ahmad said that letters have been written to cellular companies for obtaining information against those making unnecessary, fake and hoax calls.
The financial burden was the major cause of thinking marriage and childbirth are unnecessary, as 25.3 percent said so.
Led by corresponding author Katie Suda of the University of Illinois-Chicago, the researchers also looked at the prescriptions regionally and found unnecessary prescriptions to be most prevalent, on a percentage basis, in the West; 11,601 of the 13,735 prescriptions written, or 85 per cent, were out of sync with the guidelines.
There has been an increasing number of member/payer complaints against providers about extended and unnecessary in-patient admissions.
'The Philippine Embassy in Damascus issued another advisory early Monday urging Filipinos to stay indoors and avoid unnecessary movement after several locations in the Syrian capital were subjected to missile strikes,' the DFA said in a statement.
Consultant Gastroenterologist Dr Om Parkash quoted that fact is that an average a person gets 4-8 injections annually, most of which are unnecessary.
It is important that the security of VVIPs including president, prime minister, judges, etc., should not be compromised at any cost but it's equally important to avoid unnecessary expenses causing loss of millions to the national exchequer annually.
The average monthly frequency of unnecessary testing in that practice fell from 64% before the intervention to 41% afterward.