Sentence examples for been impossible to prove from inspiring English sources

Stone tools have been found at sites with Australopithecus fossils, as well as bones with possible cut marks dating back to 3.2 million to 3.4 million years ago, but in the absence of a fossil hand gripping a tool, it has been impossible to prove that australopithecines made and used tools.

Although parts of the dossier have been impossible to prove, since taking office Trump has certainly turned the international world order on its head.

The LNT model has always been impossible to prove correct, but it could be proven to be incorrect.

It is impossible to prove a negative.

But it is impossible to prove.

"It's impossible to prove something like that," he said.

Such theories are impossible to prove, but they're part of the fun of the game.

Any proposed solutions without such material, be impossible to prove correct".

"It is impossible to prove such an act except through confession, and confessions are suspect".

His case is impossible to prove, but too plausible and too much fun to ignore.

But critics argue this "additionality" is impossible to prove and open to abuse.