Context:The question continues to be valid; one corollary of , or perhaps pre-condition, is the need to know the purpose of the text to be evaluated...
Source: Adab, B. ‘The Translation of Advertising: A Framework for Evaluation’ in Babel 47 (2) 2001 (pp. 133-157)

Definition: A natural consequence or effect; a result.
Source:King sofeware dictionary

Example: It is a logically necessary corollary of their argument.