| valid | Effective; producing the desired result; verifiably correct. Origin: L. Valeo, to be strong (05 Mar 2000) |
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| validation | The act or process of making valid. Consensual validation, the confirmation of the experience or judgment of one person by another. (05 Mar 2000) |
| validity | 1. The extent to which a measurement, test or study measures what it purports to measure. 2. Occasionally, accuracy. (18 Nov 1997) |