> Transcription can lead to the same conditional in two blocks of similar code instead of the two intended. It can lead to fencepost errors due to changing or inverting an inequality. And in some languages it can lead to code that looks up data that doesn't exist (misspell a property name outside the happy path).

Funnily enough, all of those are also problems with copy-and-paste. But they're much more likely to occur through copy-and-paste, because it's easy to do that without reviewing the code.