Disputable (adjective)

1. Open to question or debate.
2. Capable of being disputed or contested.

Origin:

From dispute + -able.

Examples:

1. The theory was disputable and needed further research.
2. The results were disputable and needed to be verified.
3. The claim was disputable and needed to be substantiated.
4. The evidence was disputable and needed to be examined.
5. The decision was disputable and needed to be reviewed.