As far as I know, Satoshi created software first to check if everything works as expected. Bitcoin whitepater was written by him/her only after the implementation and just before approaching community.
To be honest, I don't care about what Satoshi did but AFAIK it was not the case.
I'm aware of this
thinking by code thing, not a fan tho, I've tried it, works for small projects and smart hacks, lots of fun but not really applicable in most of the occasions, especially not for pushing an already invented technology to its edges, what we are talking about and desperately need for bitcoin.