Peer review is how most science is defined as science and peer review does not require reproduction of the work.
For example, much of computer "science" is not. Math maybe, engineering probably, design sometimes, but "science" is rarely done. BUT the science envy is there, especially post 1990s, and it is as confusing as heck when multiple definitions of "science" collide in a conference culture.
Yes I'm a researcher, no I'm not a scientist.