In our time, for example, we’ve been bandying about the term quantum for decades (e.g. ‘quantum leap’)—although the vast majority of us have only the vaguest idea what that means, and actual quantum devices are only now beginning to appear.
Also, remember that the Israelites had just come out of Egypt, which is one of the few places in the world where they would have encountered iron implements—in construction, in the materiel of the military, etc. Like modern Israel with Soviet materiel in the twentieth century, the ancient Israelites may also have captured iron instruments in battle—they just didn’t know how to produce it, or work it, themselves, until much later.
Last but not least, if indeed, as Jewish tradition has it, Moses himself wrote the Pentateuch, he certainly, as a former Egyptian prince, would have had first-hand knowledge of iron.
But if it’s evidence that the Pentateuch wasn’t written contemporaneously that you want, there’s a much more telling indication…