Contradiction with Proverbs 30:5
Contradicts the idea of human instruction in Isaiah 8:1 with the assertion that every word of God is pure.
Proverbs 30:5: Every word of God [is] pure: he [is] a shield unto them that put their trust in him. [pure: Heb. purified]
Contradiction with 2 Peter 1:20
Suggests no prophecy is of private interpretation, contradicting the personal instruction in Isaiah 8:1.
2 Peter 1:20: Knowing this first, that no prophecy of the scripture is of any private interpretation.