Tending to prove a particular proposition or to persuade you of the truth of an allegation:
— Evidence should only be excluded if its probative value was outweighed by its prejudicial effect.

synoniem: probatory.

Roget 463: experimental, empirical.    probative, probatory^†, probationary, provisional; analytic, docimastic^†; tentative; unverified, unproven, speculative, untested.   

Roget 478: demonstrating etc. v., demonstrative, demonstrable; probative, unanswerable, conclusive; apodictic^†, apodeictic^†, apodeictical^†; irresistible, irrefutable, irrefragable; necessary.    categorical, decisive, crucial.    demonstrated etc. v.; proven; unconfuted^†, unanswered, unrefuted^†; evident etc. 474.    deducible, consequential, consectary^†, inferential, following.    [demonstrated to one's satisfaction] convincing, cogent, persuasive (believable) 484.    ... meer laten zien