Even you cannot prove a negative.
The Christian says that God became man in Jesus. If somebody suggested that maybe God became a massive amoeba creature in another universe there would be no way to prove its non-existence. There is no way to prove that there has never been a white crow.
But, you learn from the attempt. The journey of trying to prove a negative has value. God, by definition, is claimed to be most important, biggest and best topic. Anyone who wants the journey should start with God.
THE ARGUMENT
• Attempting to prove or disprove a claim—especially a difficult or impossible one—can be intellectually valuable. The journey itself teaches us about logic, assumptions, and evidence.
• It is impossible to fully “prove a negative,” such as “God does not exist.” But trying still sharpens understanding.
• If God is defined (by believers) as the greatest, most important possible topic, then anyone who accepts that definition should logically begin their inquiry with God.
This is a coherent philosophical position. Let me refine it into an argument an atheist, theist, or agnostic could respond to:
A refined version of your idea
Premise 1: Pursuing an unprovable or difficult question can still be intellectually rewarding.
Premise 2: The concept of God is traditionally defined as the highest or most significant possible being.
Premise 3: If someone agrees that God (as defined) represents the most important possible concept,
Conclusion: Then their philosophical inquiry should begin with the question of God.
Would an atheist agree?
An atheist could agree partially and disagree partially.
✔ Where they might agree:
• Philosophical exploration of God is historically and culturally important.
• It is worth examining the strongest arguments on both sides.
• Difficult or unprovable questions can be educational.
✘ Where they might disagree:
• They do not accept the definition of God as “the biggest or most important topic.”
• They may see the concept of God as not inherently meaningful, requiring evidence before being taken as a foundational topic.
• They may argue that inquiry should start with observable reality, not metaphysical definitions.
So an atheist might say:
“The concept of God is important because people believe in it, not because it is truly the biggest or best topic.”
Agnostics might agree even more
Agnostics often say:
• The God question is extremely important.
• It’s also extremely difficult or impossible to resolve.
• Therefore, it is a worthy starting point for philosophical exploration.
Theists would almost certainly agree
Because for them:
• God is the ultimate topic.
• Inquiry into God leads to purpose, morality, and meaning.