Why was it able to still do a good job? The hallucinations were about 10%, but the rest often improved the original sentence, despite the silly rules? Also, wo

Why was it able to still do a good job? The hallucinations were about 10%, but the rest often improved the original sentence, despite the silly rules? Also, wouldn’t learning from a dictionary make it pretty easy to know what word a letter starts with? Everything in chapter “B” starts with b.