Are scientists always objective?
Not all the scientists are always objective, their context and culture is capable of shaping their way of see or think about things.
Science is evidence based process.
I do agree that science is an evidence based progress, because for all the progress that have been done in world history, there had been a path to follow. Since investigations about a theory or a hypotesis to experiment to prove that a claim is true or discover new things.
1 fallacy report.