Rom 15:14 Now I myself am confident concerning you, my brethren, that you also are full of goodness, filled with all knowledge, able also to admonish one another.

In Romans, Paul describes his read as filled with “all knowledge”. This is in context of a critique. Although the Romans have “all knowledge”, Paul “reminds” them of some points about the Gentiles. Contextual, the “all knowledge” is either a limited scope (e.g. you have pretty much all the theology I can teach) or “tongue in cheek” (i.e. you think you have pretty good knowledge of the issues, but I am going to remind you of something you are missing). The phrase, although if taken about God would certainly be a prooftext for omniscience, is anything but.