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Defective vs Valid - What's the difference?

defective | valid |

As adjectives the difference between defective and valid

is that defective is while valid is valid.

defective

English

Adjective

(en adjective)
  • Having one or more defects.
  • * {{quote-magazine, date=2013-03
  • , author= , title=The Smallest Cell , volume=101, issue=2, page=83 , magazine= citation , passage=It is likely that the long evolutionary trajectory of Mycoplasma went from a reductive autotroph to oxidative heterotroph to a cell-wall–defective degenerate parasite. This evolutionary trajectory assumes the simplicity to complexity route of biogenesis, a point of view that is not universally accepted.}}
  • lacking some forms; e.g., having only one tense or being usable only in the third person.
  • Usage notes

    * Nouns to which "defective" is often applied: merchandise, goods, part, component, product, equipment, gene, unit, construction, design, drug, memory, wiring, machine, device, instrument, hardware, software, vehicle.

    Synonyms

    * faulty

    Noun

    (en noun)
  • A person considered to be defective.
  • * {{quote-news, year=2007, date=January 15, author=Bernard E. Harcourt, title=The Mentally Ill, Behind Bars, work=New York Times citation
  • , passage=There were many more kinds of mental institutions at mid-century, ones for “mental defectives and epileptics” and the mentally retarded, psychiatric wards in veterans hospitals, as well as “psychopathic” and private mental hospitals. }}

    See also

    *

    valid

    English

    Adjective

    (en adjective)
  • Well grounded or justifiable, pertinent.
  • *{{quote-magazine, year=2012, month=March-April
  • , author=(Jan Sapp) , title=Race Finished , volume=100, issue=2, page=164 , magazine=(American Scientist) citation , passage=Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?}}
    I will believe him as soon as he offers a valid answer.
  • Acceptable, proper or correct.
  • A valid format for the date is MM/DD/YY.
    Do not drive without a valid license.
  • Related to the current topic, or presented within context, relevant.
  • (logic) Of a formula or system: such that it evaluates to true regardless of the input values.
  • (logic) Of an argument: whose conclusion is always true whenever its premises are true.
  • An argument is valid if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent.

    Antonyms

    * invalid

    Hyponyms

    * sound