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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It's officially Unpacked week, which means antsy phone buyers are getting several new models to seriously consider. If you're a power user in particular, you may be weighing the new Samsung Galaxy S26 Ultra against the Google Pixel 10 Pro XL, both of which can be argued to offer the best of Android phones in the first half of 2026.
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await dropOld.writer.write(chunk3); // ok, chunk1 discarded