If you pet the money, everytime he writes a meaningful word (or sylable in the beginning), and kick the moneky averytime he writes something like "hhgvr", he will after a while write readable words.

And he does that without every getting tought the correct words. The
teaching effect is just the petting or punishmet.

Taking this further, and taking out the intelligent reader, this
"petting and kicking" can be transformed to finding food or dieing in the desert.
Which is "nature" teaching to do a favoable behaviour.

(...now following the argumentation towards getics, mutation etc...
but im a bit too lazy now)