I have reordered the premises.
1) 'THE BIBLE IS GOD'S WORD' - The Bible might be God's word, but the physical presentation of this word has gone through that fallible hands of man. The "word of God" has suffered the "editing of man".
2) 'GOD CANNOT ERR' - I seems to me, that even if you accept the Bible as being "The Truth", it does document the failings of God. God created the earth to be a paradise, and that paradise failed to last. God erred.
3) These two premises lead to the conclusion that the 'BIBLE CANNOT ERR' - I think this conclusion breaks down, because premise 1 breaks down. Precise 2 is irrelevant.
I, in making the above comments, in no way mean to discount the value of Christianity.
Moose