Dan,
Respectfully, that's the strange tactic that biblical inerrantists have to use to make the Bible make sense or appear less "mytho-poetic" than it does, namely, adding to scripture to even out the rough edges. Like assuming that all the animals in the ark went into deep hibernation for the year long voyage! Ha!
N.T. Wright wrote about this somewhere: that fundamentalists and inerrantists don't want the Bible we have, they want some other Bible with all sorts of additions and qualifications to make it say something that it was never intended to say.
But, believe as thou will. :)
A.D.