I am a scientist and will start my PhD next year. Your cousin is pulling an old trick that many religious people like to use to "prove" god. They introduce a lot of logical real arguments in quick succession and quickly introduce a logical fallacy that most people go along with. First of all as a computer scientist, your cousin is not in any position or field to be making statements like "he proved god". The business of proving god is not the business of any real science, as the idea exists outside the physical universe. His degree in computer science makes him as qualified to prove god as a waiter, or any other profession. The appeal to intellectual authority is another ploy the religious often use, "Isaac Newton believe in god".....ok good for Isaac Newton, he also believe in alchemy. It's an attempt to make you feel stupid and just accept it because you're not smart enough to offer any argument in their opinion. I mean, who are you to argue with Isaac Newton? Your cousin is doing something similar but egotistically he's using himself as an authority figure. Below I will sum up the type of logical fallacy your cousin is using.
There is day; therefore there is light
There is light; therefore the sun exists
The sun is not always seen; therefore there is night
The night does not last forever; therefore the sun rises
The sun rises; therefore a god is pushing the sun into the sky
Therefore god exists.
He is listing a lot of scientific fact and then quickly tossing god into the equation and hoping you don't notice the hiccup in the logic. I hope this helps you.