Science taught or believed dogmatically or by a democratic vote of approval is not science. Despite the fact that biologists have a consensus for evolution, this is not necessitate it’s being truth in itself—they could all be biased or deceived or jumping to the conclusion. They must always be ready for new discoveries that may shed more light on some theory or discovery. The door must be kept open for new light to be shed on a subject. Just because scientists agree on a so-called “fact” doesn't make it true epistemologically. Note: Science is limited to the observable, measurable, and testable.
Because there are limits and parameters to what science can know or study, for instance, it follows that metaphysical questions cannot be answered fully by the scientific method. Science deals in the physical universe. But when scientists harness science for unscientific reasons like making philosophical or religious decrees, it’s not science but “scientism.” That is to say when Carl Sagan said, “The Cosmos is all that is or was or ever will be,” he was making a philosophical statement, not a scientific one. One example of consensus that proved fallacious was the geocentric Ptolemaic solar system.