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by osculum 1194 days ago
That’s an oversimplification. Saying that it’s error prone because you have to write in two places is akin to saying that using a checksum is error prone: you have to write now the vale AND the checksum! More opportunities to make an error!

Doble entry accounting is very similar to a checksum in that sense. It provides error detection. If you make a mistake in one of those two places, you will know immediately. As opposed to single entry, where you can carry that error indefinitely until somehow you catch it.