Referencing one or more passage of scripture, and any seconday external sources, what is the supportable, Biblical basis for the doctrine of the innerrancy of the Bible?
Off the top of my head the two verses that come to mind is 2 Tim 3:16(NIV)
"All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness"
So it's clear that scripture is what God said and God cannot lie.
Hebrews 6:18 says
"That by two immutable things, in which it was impossible for God to lie, ..."