When i got into waterloo this morning i stood on the escalator & noticed a sticker with some graffiti on it 3 steps infront of me. Nothing new there apart from the fact i'd noticed the exact same sticker from same spot a few days earlier. I wondered what the probability was that it was the same one & there weren't just loads of them stuck on the steps. Then i decided that was too mathematical & decided to just think it was pretty cool & leave it at that!
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