Scorecards & Righteousness

In the opening lines of this week's Torah portion Noah, the namesake and relative hero of this parsha, is referred to as a righteous man who walked with G-d. Yet Noah's actions, or inactions, call his righteousness into question. The rabbis of the Talmud debate this, and compare the righteousness of Noah with a different figure, one who doesn't appear in this week's portion, Abraham.