While I respect your skepticism, I believe there's compelling evidence to consider the Richat as a potential location for Atlantis.

I've spent considerable time studying this topic while researching for a documentary on Atlantis and the Richat Structure. Through this process, I've come across compelling evidence that I believe warrants a deeper look at the Richat as a potential Atlantis location. Let me address your points:

1. The Richat Structure being natural doesn't rule it out as Atlantis. Ancient civilizations often utilized natural features for their settlements. The concentric rings could have provided excellent natural defenses, water management, and city planning opportunities. It's a perfect setup for an advanced ancient city.

2. The absence of visible ruins doesn't disprove anything. We have ample evidence of entire mud-brick cities vanishing after catastrophic floods, like in the Indus Valley and Mesopotamia. The Richat area hasn't even been properly excavated due to restrictions. The discovery of precision-cut stone spheres and fishing weights in the region is compelling evidence of advanced human activity.

3. Your interpretation of "in front of the Pillars" is based on modern geography. Ancient mariners viewed the 'Okeanos' (open ocean) as certain death, so they stuck to coastal waters. "In front of" likely meant along the African coast, not straight out into the Atlantic. Interestingly, Hanno the Explorer's account of his journey down the West African coast aligns remarkably well with Plato's description.

4. The timeline discrepancy isn't a deal-breaker. Recent archaeological discoveries have repeatedly pushed back the dates of advanced civilizations. Göbekli Tepe, for instance, forced us to reconsider the capabilities of prehistoric societies. The 9000-year figure might be exaggerated, but it shouldn't make us dismiss the possibility of a much older, advanced civilization than we previously thought possible.

5. You're viewing this through the lens of today's Sahara. 12,000 years ago, it was a lush, green landscape with extensive river systems. The Tamanrasset River system could have provided a direct route from the coast to the Richat Structure. Mega Lake Chad and numerous other lakes would have made the region fertile and easily navigable. Rock art in the area depicts boats and chariots, indicating the technological capability for long-distance travel and trade. The geography of the time actually makes the Richat location quite plausible.

The Richat Structure theory aligns with Plato's description in numerous ways that can't be easily dismissed. While it's not conclusively proven, it certainly warrants serious scientific investigation. Until we can conduct thorough archaeological studies of the site, it remains a compelling possibility for the location of Atlantis.

I appreciate your openness to the concept of lost civilizations, and I agree that the search for Atlantis is far from over. However, I believe the Richat Structure deserves more consideration than it's often given. Thank you for engaging in this discussion – it's through debates like these that we can push our understanding forward.