That of which, from its nature, the law allows no contradiction or explanation.(adjective)
(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "conclusive evidence" in a sentence
"Although there is no conclusive evidence that the Templars were the masterminds behind the underground alchemical network, we do know that the ‘inner circle’ were interested in alchemy—as we have seen in the proximity of alchemical centres such as Alet-les-Bains to Templars commanderies."
"Cannily, he does not claim it as the only possible connection, because there is no conclusive evidence for it, but he admits that it is the most plausible."
"Dr. Tarnower was best known as the author of The Scarsdale Diet, so his death seemed to provide conclusive evidence that diets could be bad for your health."