[betty boop]

Mathematical structure, completely removed from and unrelated to the reality of the physical structure of what it purports to explain?

Of course not. Sooner or later, the "reality test" must be engaged.

Evidently Rosen proposes a direct correspondence exists between the structures of mathematics and the real world. As Einstein did, by the way.

We all know how fruitful that presupposition was to Einstein — even though it took many years before proper experiments could be framed and finally tested. Which, when they could finally be performed, showed that Einstein's theory was correct.

[tacticalogic]

Of course not. Sooner or later, the "reality test" must be engaged.

When does Rosen propose to engage the "reality test"?