In conventional RE (and the rest of science with which it is interwoven), science can be divided into two categories.
Settled science is things like F=MA, acid + base -> water, a salt, and heat, the periodic table, etc etc etc. Although one can go into solipsism and argue not much can be known, most scientists, engineers, students, and others live their lives as though these things were 100% true. Millions of people for hundreds of years have treated Newton as true, and they have done amazing science and engineering using this science. This stuff is in textbooks and taught everywhere, pretty much 100% consistent. Engineers confirm it by making gadgets, students confirm it with experiments.
Then there is thew controversial edge of science, things like quantum, string theory, big bang. Scientists argue and disagree, sometimes much like FES, usually more restrained and careful.
Clearly, FE science has a controversial edge to its science and is equivalent to RE science in that way.
Does FE have any equivalent to RE settled science? What things about FE have been used, tested, and found by all FEs to be consistent with all that is known about FE?