from Kerry Fraser of TSN,

Assuming the on-ice officials determined O'Reilly contacted the puck above the crossbar but below his shoulders the puck is eligible to be played by any player. We know that the puck did not enter the net directly off the stick of Ryan O'Reilly but instead glanced off Bruins goalie, Niklas Svedberg and then deflected into the net off the leg and skate of Dennis Everberg. Since there was no distinct kicking motion by Everberg, logic and common sense would indicate that this should be a good hockey goal.

Bill, this is where your question has exposed the contradiction!

Rule 80.3: When an attacking player causes the puck to enter the opponent's goal by contacting the puck above the height of the crossbar, either directly or deflected off any player or official, the goal shall not be allowed (This translates that the subsequent deflection of the puck off the leg and/or skate of Everberg should still result in no goal).

Only to be contradicted by Rule 78.4: If an attacking player has the puck deflect into the net, off his skate or body, in any manner, the goal shall be allowed. The player who deflected the puck shall be credited with the goal...

more and watch the play below...