I have no idea who Sye is, but it sounds like he has the right idea.
Without God, we wouldn't know anything. God is necessary for all immaterial things such as math and logic. Math and logic were created by God. Math is not an invention. That's why you can't patent a formula, because it's not created, just discovered.
God cannot not exist.
-Horus cannot not exist
-Isis cannot not exist
-Mithra cannot not exist
-Unicorns cannot not exist
-Santa Claus cannot not exist (the presents got there somehow!)
Presuppositional apologetics (really founded by Dr. Greg L. Bahnsen, cmfnow.com) has been utterly falsified many times over. You cannot make arbitrary assertions about the nature of reality and win by default (firstly b/c anyone can do that, as I showed above). "Without God we wouldn't know anything"
is an unsupported assertion. You can't know what we could or could not know without a God b/c you haven't demonstrated that there is one. You've put the cart before the horse. Like everything else in your theology you have just claimed it.
But making empty claims doesn't demonstrate that your beliefs are true. So when you make claims like this I'm just going to ask: How do you know that?
Second, what makes you think there are "immaterial things"? This is just another of your assumptions, in the long line of ignorant assumptions you have made.