§162

If we teach someone the Cyrillic alphabet and then put a passage before them in Cyrillic script which they go on to read, as taught, then we might say that they have derived the sound from the written pattern by a rule we've given them. We'd also call that reading. Does that mean that reading = deriving a reproduction from an original?

How do we know somone has derived something from the original? - by behavioural criteria - such as seeing them consulting a table.
- This doesn't answer the first question (does reading = deriving a reproduction from an original?)