I think I would grill him, I'd start with this question first though:

Why is the night sky not green with yellow and blue and orange and red and other color stars. I mean you are the A-Number 1 creator and yet you left the night sky kind of boring. Everywhere else we look we see no dearth of color in nature. Yet at night it is a plain two tone monochrome. The moon only rarely shows any color at all. Really why all the shades of grey at night, so dang boring.

The other question would be about what else questions:

You have given us all the answers in life all we have to do is find the right question then we get the right answer, but why make it so hard for us to formulate the question. One example is to get the right answer to why is the sky blue, it takes a lot of formulating the question to arrive at the correct answer. It is so so frustrating to just keep finding more question when all you need is a simple answer. I still do not think it is due to refraction, after all if it was there would be some scattering of that refraction in the night sky and it would be a different color other than black.

Well those are two questions I would ask, believe me there are a whole lot more but those will do for the post just to keep the comment short.