The Transcendental Argument for God TAG, tries to prove the existence of god by stating that some basic properties of the human experience can't be explained any other way. TAG'ers claim that logic; the laws of nature and morality can't exist without god. God and the entire universe is a manifestation of the "god consciousness" a great story but at some point I think they need to prove something outside the universe exists, as well as, explain which came first god or consciousness. Without god, consciousness couldn't have existed, and consciousness couldn't exist without god! Therefore god exists but not in the way that anything else that exists - exists.
They have proven nothing about god. Their logic also requires a rock to be something that it wasn't just a moment ago! When we perceive a rock (perception is a firsthand form of awareness) I do not need to construct a proof in order to validate it. It is on the basis of perception that I can recognize that an object is itself, that a rock is a rock, not a mushroom. From this instance of perception, I already have the material to form the principle: If a rock should exist, it must be a rock (facts that are merged into a whole) discovered firsthand in reality.
3rd option to explain the nature of logical absolutes: The Christian worldview states that God is absolute and the standard of truth. Therefore, the absolute laws of logic exist because they reflect the nature of an absolute God. Logical absolutes are products of the Christian worldview there are no absolutes in history, science or logic. The TAG'ers are trying to use logic to prove god exists because they believe logic is an absolute law. Logical reasoning is not an absolute law that governs the universe. It was logical that it was impossible to go to the moon in the 1600 hundreds (a logical conclusion) given the science of that day. If something is logically impossible today, does that mean it is impossible, period. It was also believed at one time that Euclidean geometry was a universal law, we now know that the rules of Euclidean geometry are not universal. Logic is not a set of rules that govern human behavior. Humans may have logically conflicting goals. It's obvious that whether something is logical or not depends on other factors. Therefore there are no logical absolutes.
Evolution is how (logic) cognitive skills evolved in order for man to survive. The more difficult it was for an organism to survive the smarter it became. Logic did not produce humans - humans developed logic.
The TAG'ers proof of God's existence lies in the fact that God's existence is the necessary presupposition for all human knowledge. Man, as a limited being, must start their knowledge with God's revelation in order to know anything at all and interpret the universe at all. God, as the measure of all things, is where our reasoning comes from. This is not a "scientific theory" it is a statement that belief in god is required for the world to make sense. They do not explain how belief in god does anything for understanding, or give any example of belief making anything in science, history, logic etc. more understandable. They claim understanding of these very topics requires divine revaluation. This means that if we didn't believe in god history, logic or science would no longer exist. However, atheists and many theists believe history, logic and science all go on whether anyone believes in god or not.
The transcendental proof for God's existence is that without god, it is impossible to prove anything, and the Christian worldview in its entirety is true, and anything that does not agree with it is false. If God's revelation is rejected, then the skeptic is left in foolish ignorance because his philosophy does not provide the preconditions of knowledge and meaningful experience.
However, if god needs human reasoning to be validated, then human reasoning is more important than god, and in that case god would not be imperative, and would not be god. A god that needs man to validate him can't be god.