An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 4 Search : valid
invalid
  ناپای‌مند   
nâpâymand

Fr.: invalide   

Logic: The quality of an argument when its conclusion is false even if all the premises are true.

in-; → valid.

invalidity
  ناپای‌مندی   
nâpâymandi

Fr.: invalidité   

invalid; → -ity.

valid
  پای‌مند   
pâymand

Fr.: valide   

Logic: Of an argument, if the premises are true, then the conclusion cannot be denied without contradiction. The truth of the premises logically guarantees the truth of the conclusion.

M.E., from M.Fr. valide, from L. validus "strong, effective," from valere "to be strong."

Pâymand, from pâ, pây "foot; base, foundation, firmness" (Mid.Pers. pâd, pây; Av. pad- "foot;" cf. Skt. pat; Gk. pos, genitive podos; L. pes, genitive pedis; P.Gmc. *fot; E. foot; Ger. Fuss; Fr. pied; PIE *pod-/*ped-) + -mand possession suffix.

validity
  پای‌مندی   
pâymandi

Fr.: validité   

Logic: Of an argument, whether or not the conclusion follows logically from the premises and the allowable syllogisms of the logical system being used.

Quality noun from → valid.