valid

comparative more valid · superlative most valid

1. Well-grounded or justifiable, pertinent.

   I will believe him as soon as he offers a valid answer.

   1 more example

   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?

   2012 March-April, Jan Sapp, “Race Finished”, in American Scientist, volume 100, number 2, archived from the original on 05 Sep 2015, page 164

   Synonyms: arguable, groundly, proper, warrantable

2. Acceptable, proper or correct; in accordance with the rules.

   Do not drive without a valid license.

   1 more example

   A valid format for the date is DD/MM/YY.

   Synonyms: legit, legitimate

3. Related to the current topic, or presented within context, relevant.

   Synonyms: applicable, germane, applicable, apposite, apt, ad rem, well-placed, felicitous

4. human sciencesOf a formula or system: such that it evaluates to true regardless of the input values.
5. human sciencesOf 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.

6. ChristianityGenuine - as distinguished from efficient or regular - sacrament.