On Thu, 18 Jan 2018 09:42:19 -0800
pyotr filipivich wrote:

I'm reminded of the Texas expression "He's read a book".
Which can be taken either way: he's read a book and _thinks_ he knows
what he's doing OR he not only knows the practical of the job, but
has read up on the theory. Be that cattle ranching, carpentry or
cabinet work.

depends which part of texas but mostly it is the first translation

there is an old one that might not be related but could be

beware the man of one book


most agree that reading is a good thing but have to also take the nose
out of the book and observe too