[simonh]

>The Boltzmann Brain says that our conscious experience at the current moment is a chance quantum event.

I just meant that the proposition that an iron bar might be viewed as containing a consciousness, is similar to the idea in the BB proposition that consciousnesses might arise spontaneously in random matter in space. Well they might, but that doesn't prove or refute anything about consciousness.

The bit about Boltzmann's Brains possibly outnumbering real evolved brains is a separate philosophical question I didn't mean to address, and I apologise for the confusion.