What's the difference between necessity and prerequisite?

Necessity


Definition:

  • (n.) The quality or state of being necessary, unavoidable, or absolutely requisite; inevitableness; indispensableness.
  • (n.) The condition of being needy or necessitous; pressing need; indigence; want.
  • (n.) That which is necessary; a necessary; a requisite; something indispensable; -- often in the plural.
  • (n.) That which makes an act or an event unavoidable; irresistible force; overruling power; compulsion, physical or moral; fate; fatality.
  • (n.) The negation of freedom in voluntary action; the subjection of all phenomena, whether material or spiritual, to inevitable causation; necessitarianism.

Example Sentences:

  • (1) The indication of the DNA probe method would be considered in the four cases as follows, 1. necessity of the special equipment to isolate the pathogen, 2. necessity of the long period to isolate the pathogen, 3. existence of the cross reaction among the pathogen and relative organisms in the immunological procedure, 4. existence of the difficulty to identify the species of the pathogen by the ordinary procedure.
  • (2) Among 159 patients studied, the severity most frequent was Yahr stage 3 (63%) at first examination, indicating the necessity of earlier diagnosis.
  • (3) When a product is selected for a patient, consideration should be given to necessity, efficacy, adverse effects, and cost-effectiveness.
  • (4) Discussion deals with the plurality, specificity, variability, perceived necessity, sufficiency, international utility and career significance of British postgraduate qualifications.
  • (5) As a result of recent environmental changes in the health care industry, marketing has become a vital necessity for the survival of most hospitals.
  • (6) There is a necessity for early definitive decision-making in the borderline orthognathic surgery patient and the role of orthodontic camouflage is pointed out.
  • (7) For Kohut, interpretation depends on the prior establishment of a stable, sustaining transference; human connexion is a lifelong necessity and full understanding an achievable aim.
  • (8) Management and treatment issues are surveyed, such as the necessity to recognize that in some adolescents violence erupts not from narcissitic rage but from strong wishes for affectionate contact.
  • (9) A prospective study of the necessity of sedation, or analgesia, or both in total colonoscopy was performed.
  • (10) The authors report on the casuistry of aorto-coronary by-pass operations they performed between April 1971 and December 1974, discussing the criteria which indicate the necessity of operating, the principles of the operative techniques, and the results obtained.
  • (11) This case, despite the fatal outcome, emphasises the necessity for a comprehensive approach to the diagnosis of atypical pneumonia, including culture for Legionella, especially in immunocompromised patients.
  • (12) The sonographic method, with a 97.7% specificity and a negative predictive value of 89.5%, proved to be specific enough to eliminate the necessity of routine catheterization for measuring residual bladder volumes of greater than or equal to 150 cm3, thus decreasing the incidence of some major postoperative complications that can occur due to unnecessary catheterization.
  • (13) The development of gallstones following this procedure, however, has become more problematic in that further opeation becomes a real necessity.
  • (14) The necessity of using immunohistochemistry in the diagnosis of sinonasal tumours of fibromatous nature is emphasized.
  • (15) The experience with 1896 restorative operations on injured nerve trunks shows a necessity to consider the problems of diagnosis, prognosis and choice of the treatment, and especially the results of the nerve suture, not in all patients with nerve injury but only in separate groups being comparable with respect to the kind and severity of the trauma.
  • (16) Clinico-immunological studies on the use of drugs containing synthetic and biological polymers revealed their high immunomodulating activity and necessity of differentiated use of these drugs with relation to the pathogenetic mechanisms of development of bronchopulmonary diseases as well as mechanisms of their immunological action determined by the molecular mass of polymers as constituents of blood substitutes.
  • (17) We consider that the rarity of stricture rules out the necessity of any change in management, whether or not erosive oesophagitis is observed at endoscopy.
  • (18) The discrepancy between the judgement of the insurance company based upon the medical records and the patients complaints also 4-7 years after injury as well as the diversification of therapeutical procedures used in the long term patients career are indicating a necessity of prospective study on cervical spine injury.
  • (19) Through small and large acts of deprivation and destruction we follow the process: the removal of hope, of dignity, of luxury, of necessity, of self; the reduction of a man to a hoarder of grey slabs of bread and the scrapings of a soup bowl (wonderfully told all this, with a novelist's gift for detail and sometimes very nearly comic surprise), to the confinement of a narrow bed – in which there is "not even any room to be afraid" – with a stranger who doesn't speak your language, to the cruel illogicality of hating a fellow victim of oppression more than you hate the oppressor himself – one torment following another, and even the bleak comfort of thinking you might have touched rock bottom denied you as, when the most immediate cause of a particular stress comes to an end, "you are grievously amazed to see that another one lies behind; and in reality a whole series of others".
  • (20) In light of the AIDS epidemic and the necessity for safe-sex practices, the topic of caution and prevention is an emerging and critical discourse for the sexual encounter.

Prerequisite


Definition:

  • (a.) Previously required; necessary as a preliminary to any proposed effect or end; as, prerequisite conditions of success.
  • (n.) Something previously required, or necessary to an end or effect proposed.

Example Sentences:

  • (1) Confidence is the major prerequisite for a doctor to be able to help his seriously ill patient.
  • (2) The high participation percentage also shows that the prerequisite of screening, namely, a positive attitude on the part of the population, was as well fulfilled in the present project.
  • (3) For consistent identification of the normal pancreas, preliminary longitudinal scanning at, or near, the mid-line and subsequent oblique scanning in the long axis are necessary prerequisites in delineating the anatomic outline of the pancreas.
  • (4) This quantitative characterization of the properties of conduction and refractoriness of both the accessory pathway and ventriculoatrial conduction system and the relation between these characteristics and the accessory pathway location in ART patients provides additional insight into the prerequisites for the initiation and maintenance of this rhythm disturbance.
  • (5) She has imbued me with the confidence of encouraging other girls to dream alternative futures that do not rely on FGM as a prerequisite.
  • (6) The prerequisite for all champions is the refusal to cave in, so City's equaliser with only three minutes remaining was pleasing.
  • (7) To meet these prerequisites we have introduced some technical refinements: (1) computer-controlled rectilinear translations of the target in combination with different angular positions of the source and (2) computer-controlled rotations of the target around a vertical axis in combination with different angular positions of the source.
  • (8) Binding of the ilvY product at the O1 and O2 operator sites is co-operative and this ilvY protein-DNA complex in the presence of acetohydroxy acid isomeroreductase substrate is a prerequisite for RNA polymerase binding to the ilvC promoter as detected by DNase I protection experiments.
  • (9) These results point to HPV16 as one potential prerequisite for the first steps in the multistage development of human cervical cancer.
  • (10) Other experiments further implicated actin in the budding process during virus maturation, as there appeared to be a specific association of actin in vitro only with nucleocapsids that have terminated RNA synthesis, which is presumably a prerequisite to budding.
  • (11) We conclude that retained gastric peristaltic function is not a prerequisite for a good clinical outcome for swallowing and that despite vagotomy, the stomach continues to produce enough acid to maintain an acidic pH.
  • (12) The failure of agents which inhibit motility to inhibit capping of the normal lymphocytes suggests that active locomotion is not a direct prerequisite for capping.
  • (13) Compaction of the morula is a prerequisite for subsequent differentiation of the mouse embryo.
  • (14) Close cooperation of ophthalmological departments with vitreoretinal centres and early performance of urgent surgery are the basic prerequisites of better functional results of PPV in EHE.
  • (15) Oximeformation, for which keto acid production is a prerequisite, is discussed as part of the HA-tolerance.
  • (16) The capacity to sublimate and to foster sublimation in children is a prerequisite for normal motherhood.
  • (17) In addition, otoscopic accuracy is a prerequisite to optimal patient care.
  • (18) Such markers are prerequisites for therapeutic trials with potent drugs which are only justified for patients with fulminant hepatitis and patients with progression to chronicity.
  • (19) The article reviews practical aspects of tissue fixation and embedding protocols as well as methodologic aspects of the protein A-gold technique; careful control of these interrelated factors is the prerequisite for successful application.
  • (20) As a prerequisite for preparing bispecific antibody conjugates containing anti-tumor and anti-metal chelate binding sites that can be used for pretargeted immunoscintigraphy, monoclonal antibodies (Mabs) have been raised against an octahedral metal chelate synthetized from gallium (Ga) and the hexadentate ligand N,N'bis[2-hydroxy 5-(ethylene beta carboxy) benzyl] ethylenediamine N,N' diacetic acid (Ga-HBED-CC).