I have a question for him:
If it is true that he i knowledgeable, why did he feel the need to copy and paste the Anwering-Christianity website?
As Dhul-Qarnayn was looking at the sun, he saw it disappearing inside or behind a murky body/pond/lake/sea of dark/murky water. And of course, as I mentioned below, if the sun were to literally set inside a pool of water, then it would have to rise back again from that location and set into another body of water, which the Glorious Quran makes no mention of, and then rise back again from that body of water and set again in Dhul-Qarnayn's body of water, and so on. This never happened, and nor did the Glorious Quran mention it. The sun simply does not bounce back and forth between the east and the west on earth, and nor does the moon. The Noble Verses also do not say that the Dhul-Qarnayn went to the east or the west of the earth. No east nor west were mentioned in any of the Noble Verses, and as I mentioned below, neither does the Glorious Quran mention that there are ends of the earth. On the contrary, the Glorious Quran, as I also mentioned below, clearly and indisputably Declares that the earth is Spherical, Round, is Suspended and orbiting in Space, and is rotating around its own axle.http://www.answering-christianity.com/sunrise_sunset.htm
I recognised the tosh in the last sentence last sentence. Particularly the word 'axle', when he means 'axis'.
Anwering-christianity is as pathetic as dawah sites get. Massive amounts of stupidy and lies. Not even well presented bullshit. There isn't a single redeeming feature.
Alternatively, I think you could trap him. I would declare that the quran doesn't even have any idea that the earth is expanding. The earth is not expanding, but the Answering-Christianity website thinks that the debunked 'expanding earth hypothesis' from about 1900 is modern science, and also claims this knowledge in the quran.
Tell him that if the quran was scientific, at the very least it should be aware that the earth is expanding.