The contributor will tell you his or her opinion about the merits or demerits of the way that thing is designed, omitting any waving of the big stick to lay down laws of design. It is for you to decide if you think they are right."
The contributor will share his or her viewpoint on whether the design is good or bad, without resorting to forceful arguments to dictate design rules. It's up to you to determine if they are correct."