Reply #36: That's a fundamental failure to understand the phenomenon.

[ChadwickHenryWard]

Nobody is suggesting that the molten core is actually going to bore its way through to China. It's just a colloquial term for when the core melts its way through the floor of the containment building. It doesn't mean it will come out the other side.

Oh, and if we're being pedantic, you forgot to mention that the melted core, if it even got that far, would come to rest at the Earth's center of gravity.