Why were the Giants predicted to beat the Lions if their chances were 50 percent?

Source: http://ift.tt/g5lp9S --- Saturday, December 31, 2016
I have worked in sports a bit. I have worked in politics a bit. Sometimes lessons in each cross over. But I was left much confused by the Dec. 18 NFL Week 15 team-by-team matchup predictions [Sports... ...

from NFL http://ift.tt/2hVT1G9