wazzup:
"Surely that is the equivelant of concluding itsspring because I have seen a swallow outside?"
No. You're making a mistake. I'll try to explain.
The claim I made was that 'Neither school assembly nor acts of worship are necessary for children's development.' To show that something isn't necessary, all you need do is give a single counter-example, thereby proving that it's not impossible. That's what I did. (My children being the counter-example.)
Look. Suppose someone says that in order for something to be a swan it's necessary that it be white. All you need to do is show them a black swan - one will do - then you'll have shown them that being white isn't necessary for being a swan. If it's possible to be a swan and not be white, being white isn't necessary for being a swan.
My contention - that assembly/worship isn't necessary for growing up decent - is proved by there being someone who grew up decent without assembly/worship. That's because, as with the swan case, the example shows it's possible to grow up decent without being exposed to assembly/worship.
Can you see that now? Just logic, really.
As for your other question, 'And who says your DC have turned out OK?', that would be a reasonable thing to ask in many contexts. But, this being the internet, and you not knowing my DCs, you'll have to take my word for it. If I could give more information without outing them/myself, maybe I would. But I can't.
Of course I might be mistaken. Or, from where you sit, I could be lying in my teeth. I'm pretty sure I'm not mistaken. I've been around long enough, seen enough, to back my judgement on this. And I'm not lying.
As for your, 'How do we know anything? From what I can tell DC tell their parents very little these days,' I think that's a bit sad. My own DC tell their parents lots. Not everything, of course. That would be weird and dysfunctional. I'm sure they have secrets from me and DP. But they tell us many things about their life, discuss choices with us, let us know when things go wrong, ask advice in difficult situations, offer us support when they think we need it ... . All the things you'd want from grown-up children, really.
My DCs were brought up without what I see as religious nonsense impinging on their lives as children at all. Does that show that bringing up children without religion is bound to be a success? No, of course not. That my children are so successful as people in all the ways I've said, though, does show that thrusting religious nonsense on children isn't necessarily the way to go. So, the final conclusion (which, yes, by now we do know to be true!) ... we don't need to push religion in our schools in any shape manner or form.
[A bit long, sorry. Well done, wazzup, if you've read this far!]