"the new study indicates"
"implying"
"if"
"could easily have been"
"life may have"
"may have been"
"amino acids that likely"
"may have"
"enhancing potential"
"study indicates"
"was probably"
"new estimates"
It's called speculation. The aforementioned phrases show how it works.
Wow. Good catch.
I'll take my "science" with a bit more certainty please!
Sure, it's much better to state the truth and never admit that you have any possibility of being wrong. That will lead you to the truth in a much more efficient way since you never have to consider new evidence or modify your belief. This whole idea of provisionally accepting an idea, testing it against observations, and then modifying it if necessary is no way to get to the truth. It's much better to be completely certain about every idea you come up with, even if the idea is wrong. Then at least it isn't speculation. </sarcasm off>
Congratulations, you've just demonstrated that you haven't a clue how science actually works, since you are completely unaware of the reasons that scientists employ such phraseology.
Hint: It has nothing to do with being "mere speculation", and everything to do with the awareness that empirical knowledge, no matter how solid, is provisional. That same kind of provisional knowledge got us successfully to the Moon and back.
Come back when you understand the topic enough to be able to critique it sensibly.