Well, I thought that this was a thought provoking assertion because it challenges the whole argument that science must be silent on religion because it can neither be scientifically proven or disproven. The example of consciousness I thought was a particularly good one. Consciousness at least seems to be so ill defined in any scientific way that I can't see how you could even propose an experiment that would objectively verify or quantitate or do any other sceintific-y stuff with it. But I still think it would be ridiculous to say that it's therefore an untestable hypothesis and that science must be silent about it.
For that matter, even for "testable" hypotheses, just how testable are they in practice, and how much evidence do you need to pile up to call something "proven"? Take everyone's favorite example of evolution, specifically the part about mankind's descent from a common ancestor with great apes. Apparently it's possible to accumulate a ton of archaeological and biochemical evidence supporting the idea, but it would be impossible to go back in time and directly observe the lineage unfold, so is it an unprovable hypothesis? Perhaps a better example would be one where there is still debate among actual scientists, but the ones that I can think of offhand are relatively obscure biochemical questions, and I'm not sure if the molecular mechanism by which cell surface receptors transmit signals across a cell membrane would be a very riveting example for a forum with mostly non-biologists. Suffice it to say that science can accumulate evidence to support or refute a hypothesis, but there is a very blurry line about when anything is ever proven. We just learn to live with that uncertainty.
When it comes to religion, why can't this also be treated like a hypothesis that you can accumulate evidence either for or against? I can think of a few possible answers to that question, but it seemed worth bringing this up as a challenge to the current status quo of calling religion unprovable and therefore out of the realm of science.