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Whenever I read a description of the multiverse, it always talks about human decisions causing branches. What about animals and the decisions they make? Does my hamster deciding to eat the apple first rather than the pea cause a new branch?
I live in a hard-water area and find that vinegar is a cheap and effective way to descale my kettle. But no matter how much I rinse afterwards, I won't get a decent cuppa for a week. Given that the kettle is stainless steel and plastic, why does the taint stay so long? A proprietary citric acid descaler presents no such problem, but is less effective and more expensive.