False Knowledge is something Paul cautioned Timothy to guard against.
1 Timothy 6:20. O Timothy, you must now guard the deposit, the correct knowledge and pure doctrine of the gospel, turning away for yourself from the profane chatter and contradictions of what is falsely called knowledge, (Isaiah 29:13, Psalm 118:8) 21. in which some missed the mark while professing about the faith.
Isaiah 29:13. Therefore the Lord said, Forasmuch as this people draws near with their mouth and honors Me with their lips, but has removed their heart far from Me, and their reverence toward Me is taught by the commandments of men: (Matthew 15:8,9, 1 Timothy 6:20) 14. therefore, behold, I shall proceed to do a marvelous work among this people, a marvelous work and a wonder: for the wisdom of their wise men will perish, and the understanding of their prudent will be hidden.
Psalm 8. It is better to trust in the LORD* than to put confidence in man.
Paul warns Timothy to be wary of what people teach about Scripture, since the Word of God is not to be corrupted. He mentions profane chatter and contradictions of what is falsely called knowledge, bringing confusion to the congregations of the day. A similar situation is with us today, with many off-base interpretations being spread online and in print. To study commentary as a supplement to Scripture is fine, but Scripture itself is the defining base, not the commentary. To read commentary more than Scripture tilts you off-base. Paul said to guard the deposit which is Scripture, the pure doctrine of the Good News. When Paul wrote this there was no New Testament, the Hebrew Scriptures were the whole Good News. Commentary is just a group of comments on Scripture and Scripture must be the solid base on which to judge commentary.