Learning CANNOT exist without biochemicals. Behaviour CANNOT exist without biochemicals.
Considering the fact that we are made of biochemical components, everything we do "cannot exist without biochemicals", but this is a tautology.
There are many causality chains that converge to produce a given behaviour. Some of them are biochemical or genetic, that doesn't mean they are the main causes.
I cannot go somewhere by car without a functioning engine, that doesn't mean it's the engine that determines the destination of my trip... "Ne te courbe que pour aimer..." René Char
