Probably not - since it has no actual subject, and therefore no specific answer !
Sorry but your question doesn't make sense... You have to know what the hypothesis is to test if your question is valid.
"At what expense?" is a valid question and so it is a valid sentence.
We have no valid dates for Homer, so this question has no valid answer.
There is no such valid test, so I would definitely question it.
This humanised question maker is preposterous with its valid question rules.
It can be a sentence or an essay. As long as it is a valid question, it is acceptable.
that's not a valid question.
We'll certainly try our best given you post a valid question.
(This is not a valid question)
No choices were supplied; cannot answer the question.
this is not valid to my question.
She attended NYU