You do not know. You fail to understand what you think you know comes from man. This includes our Bible and belief in it's claims.
So let's get this straight. The bible comes from man according to you. But you also say "Taking the word of God to have meaning contrary to known fact is as a denial of God's word being true"
Believers take Scripture as known fact. Jesus did. Even the devil does..
Again, what you believe from man.
Proverbs 30:5
Every word of God is pure: he is a shield unto them that put their trust in him
Luke 4:4
And Jesus answered him, saying, It is written, That man shall not live by bread alone, but by every word of God
John 17:8
For I have given unto them the words which thou gavest me; and they have received them, and have known surely that I came out from thee, and they have believed that thou didst send me
How did you choose which man's views are the truth?
If they do not agree with God's word we can file them in the fable drawer. The standard to measure things against is not so called science.