Contradiction About Whether Everyone Sins?

Is there a contradiction in the Bible about whether everyone sins?
Here is an alleged contradiction:
Does every man sin?
(a) Yes. “There is no man who does not sin” (I Kings 8:46; see also 2 Chronicles 6:36; Proverbs 20:9;
Ecclesiastes 7:20; and I John 1:8,10)
(b) No. True Christians cannot possibly sin, because they are the children of God. “Every one who
believes that Jesus is the Christ is a child of God. (I John 5:1). “We should be called children of God; and
so we are” (I John 3: 1). “He who loves is born of God” (I John 4:7). “No one born of God commits sin;
for God’s nature abides in him, and he cannot sin because he is born of God” (I John 3:9). But, then
again, Yes! “If we say we have no sin we deceive ourselves, and the truth is not in us” (I John 1:8)