Kyrie Irving was in the replay booth.

I remember that the angle which was apparently the best indicator that it was out of bounds was an overhead shot in which you couldn't see any space between the ball and the sideline. The problem is that a football, like Earth, is not a flat object like the bottom of a cleat. The replay official failed to consider whether the curved part of the football may have been raised above the edge of the sideline while the bottom of the football may have only been touching the field of play.

I think the ball probably touched the sideline, but we all know that "probably" isn't enough to overturn a call. It was one of those plays where the call on the field should have stood regardless of which way it went.