Words similar to valid

Example sentences for: valid

How can you use “valid” in a sentence? Here are some example sentences to help you improve your vocabulary:

A valid cause-and-effect design-that is, one with internal validity-rules out alternative explanations of results by comparing what happened with an intervention to what happened in the absence of the intervention.
Of these, 3621 patients had valid dates for starting dialysis in 1996.
The second point may well be valid, but the question is, would it be a noticeable difference?
What this scheme leaves unclear is why education and the environment are valid public goods while other efforts he opposes--insuring elderly people against poverty, say, or providing national health insurance--are not.
So the reverse hypothesis could be just as valid.