Conclusive means settling a question beyond any argument. Conclusive evidence, conclusive proof, far from conclusive.
It is a high bar and most evidence does not reach it, which is why far from conclusive is heard so much more often than the positive. Conclusive is not the same as convincing: a great deal of convincing evidence is not conclusive at all.
1adjectiveconclusiveSettling a question beyond any argument.
“The DNA test gave conclusive proof that he was the father.”
conclusive is a quality.
Latin conclusivus comes from concludere, to shut up or conclude — con plus claudere, to close.
Latin
conclusivus
French
conclusif
English, today
conclusive
From French conclusif, from Latin conclusivus, from Latin conclūsīvē (“conclusively”), from past participle of concludo.
Etymology from Wiktionary, CC BY-SA