Unproved (adjective)

1. Not supported or confirmed by evidence or proof.
2. Not verified or substantiated.
3. Not having been established as true or valid.

Origin:

Late middle english: past participle of unprovable, from un- (expressing negation) + prove.

Examples:

1. The theory was based on unproved assumptions.
2. The claims of the scientist were widely seen as unproved and highly speculative.
3. The company's financial performance was based on unproved projections.
4. The witnesses' testimony was unproved and unreliable.
5. The historical accuracy of the book was challenged by unproved accounts.