The phrase "a valid enough" is correct and usable in written English.
It can be used to indicate that something meets a certain level of validity or acceptability, though it may not be perfect or ideal.
Example: "The evidence presented was a valid enough reason to reconsider the decision."
Alternatives: "sufficiently valid" or "adequately valid".
And my question, the question that's caused such a stir, is valid enough, I think, in that Walliams has written three children's books in recent years, about a succession of teenage misfits, in which he acknowledges that he's drawn upon his experience as an adolescent.
The film shows a dreamy drift towards pathos, which is valid enough as an emotional register.
A confidential government review in May by the Office of Special Counsel, which deals with the grievances of government workers, found that the scientists' medical claims were valid enough to warrant a full investigation into what it termed "a substantial and specific danger to public safety".
What makes me valid enough to have a voice?
The special counsel's office, which rejects the vast majority of the public safety claims that federal employees make, found that the concerns were valid enough to warrant a full investigation, and it sent the matter to Ms. Sebelius to conduct the review.
However, considering the relatively lower prevalence of HCV infection in Korea, and the results of this community-based long-term prospective follow-up study are valid enough to support a causal relationship.
It must, however, also be taken into consideration that current diagnostic criteria might not be valid enough to really reflect the effect of a chronic acid exposure.
Three marginal penalty appeals were turned down; a fourth, when the substitute Jamie Gould bundled over Vita Astafjevs, was valid enough, and Wayne Carlisle netted.
However, face and content validation was performed and the questionnaire was judged to be valid enough for use in the present study.
