Everything is evidence and consensus. It lengthens and weakens the prose to hedge every statement, making the actual message much less clear. Yes, people need to be disclaimed from believing everything they read, but you know whose responsibility that is? The public school system, teaching people to learn how to learn. One of the main things you should have taken from high-school science classes is that every time we had some understanding of something, we got more evidence and replaced it with a better understanding of that thing--and so everything is just a best-guess given current knowledge.

So: "A positive correlation was found between X and Y"--why are you even telling me? What's the message? "There is evidence that X might cause Y"--okay, how strong is this evidence? Is it enough to care? "X probably causes Y"--that is what you're really trying to say. I will hear that and put it though my own Bayesian updating to give slightly more credence to the statement that X causes Y (more or less depending on the trustworthiness of the source, where I read it, what other supporting statements were made, etc.) The previous two forms don't change this mental process one bit, except to make it harder to dig out the thing you were actually trying to get across.