Scientists speaks, usually, in a very nuanced form with a lot of hemming and hawwing.
This theory is consistent with the known evidence. That means "We really don't know, but this might be right in part. Or Not."
"The balance of opinions is X." That means "We really don't know but we sorta kinda think maybe X, on Tuesdays."
"The consensus opinion is Y". That of course means "Ralph doesn't agree, but none of us like Ralph at all, so NYAH."
"Studies have demonstrated X." = "Some studies published in the Outer Mongolian Journal of Irreproducible Results" show X. "
"It was surprisingly shown that K" = "It was pretty obvious that it was K, but we did the work anyway."