Scientists traditionally speak in that manner.
If they claimed "proof" and TRVTH" the science-deniers would be all over them even more than they usually are with their cautious, provisional statements.
If they claimed “proof” and TRVTH” the science-deniers would be all over them even more than they usually are with their cautious, provisional statements.
From the article: MADRID, Spain - A small piece of jawbone unearthed in a cave in Spain is the oldest known fossil of a human ancestor in Europe and suggests that people lived on the continent much earlier than previously believed, scientists say.
Sounds to me like they are claiming proof in this statement....”A small piece of jawbone unearthed in a cave in Spain is the oldest known fossil of a human ancestor”. Science-deniers...good one.....