Analysis of information sources in references of the Wikipedia article "இதழாய்வியல்" in Tamil language version.
validity, n. ... 2. The quality of being well-founded on fact, or established on sound principles, and thoroughly applicable to the case or circumstances; soundness and strength (of argument, proof, authority, etc.) ... 4. Value or worth; efficacy. Merging into sense 2, from which in some instances it is hardly distinguishable.