One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.
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年初，一位名叫“给我一首歌的时间time”博主发布的一系列关于周杰伦与田馥甄的考古视频悄然走红，让两人的隐秘恋情成为全民讨论的热点。这些视频没有新采访，也没有独家爆料，却凭借显微镜般的考据拼凑出的“证据链”迅速走红，不仅引发广泛围观，更让当事人的社媒评论区迅速沦陷。