Funny. A lot of people are saying that, coming from different sides. You know nothing about my "expert," and I know nothing about you. I can no more judge the validity of your expertise than you can that of my source. I don't know what you've accomplished and done and for whom, but I do know the same with regard to my friend.
You say of yourself, "I'm not wrong." He has the same confidence in his own abilities, and I know his track record, but don't know yours.
That's about as far as it can go. Where did I see that you have practiced experience understanding and conveying the principles of perspective and lighting?
“You know nothing about my “expert,””
Yes I do. He’s not an expert. Not in this case, because he is wrong.
What more do I need to know?
>>You know nothing about my “expert,” and I know nothing about you.<<
Not true. We know your expert’s opinion on this. That means that, although he/she may be an expert on SOMETHING, he/she is apparently not an expert on this.