> all humans learn roughly the same concepts representing words like "dog", "house", "person", "boat", and so on, even if those people grew up in different plac

> all humans learn roughly the same concepts representing words like "dog", "house", "person", "boat", and so on, even if those people grew up in different places and never had any overlap between their observational experience. This "roughly" is doing a lot of heavy lifting to support the "Plato was right" thesis. The fact is we inhabit a shared reality with shared laws of physics and evolutionary pressures and so on; there are only so many ways to float a boat. That doesn't necessarily mean Platonic Forms exist and that everyone arrives independently at the same Form. Indeed you will find that people have fundamentally different ideas of what words like "freedom", "economy", "government" mean, despite using the same syntax.