@ Sir Sham
Thank you for the advice, but I think you misunderstood my meaning. I'm afraid I also find it hard to avoid reacting in some cases - such as the sort of assumption you seem to have made in your response to me.
It wasn't actually my intention to question the fact of the Big Bang which, as you say, can be observed. I didn't say that we hadn't been able to identify the Big Bang, but that - at least as far as I'm aware with my admittedly non-professional understanding - we hadn't identified the CAUSE of the Big Bang, or whether it had one.
When looking at the Big Bang, we either require that an effect always has a cause, in which case there can be no ultimate 'prime mover' - religious or scientific - and we're left having to try to explain an infinite regress, a chain of causation that's always existed; or we suppose that the Big Bang 'just happened' - in which case an effect doesn't need to have a cause. Either way, we're forced to concede certain limits to what our rationalism can tell us.
Some fierce positivists detest that notion: they prefer to insist that science will one day answer all questions. I don't believe it will. That doesn't believe that I think people should look to 'supernatural' explanations before scientific ones, but it does lead me to take due care before declaring that a thing doesn't or can't exist. Much less that someone who allows for the possibility that such a thing exists must therefore be less intelligent.
Science, like it or not, is not fundamental to the working of the universe. Science is a system - an effective one, no doubt - which WE have created in our attempt to describe and understand the universe. In its current form, it may well be lacking or incomplete - and in any case, the universe isn't obliged to respect the models we try to impose on it. At the very least, as much as science brings very real benefits (and very real terrors), I think it's always a good idea not to put too much confidence in any predetermined notions of what's 'rational'.
If that makes me a deluded religious maniac, then so be it. Although I still wouldn't have voted 'yes' on the Alpha Course's poll.