Even when one thoughtfully and judiciously plans, more often than not, such plans are overcome by external events. Therefore, never underestimate how wrong you can be!
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Everything is being run by computers. Everything is reliant on these computers working. We have become very reliant on Internet, on basic things like electricity, obviously, on computers working. And this really is something which creates completely new problems for us. We must have some way of continuing to work even if computers fail.