Earlier today, Mark Zuckerberg shared a rambling memo outlining his vision to build AI "superintelligence." In the memo, Zuckerberg hinted that the pursuit of more powerful AI might require the company to be more selective in what it open sources.Citing "safety concerns" he wrote that Meta would need to be "rigorous" about such decisions. The line stood out to many as Zuckerberg - who once said "fuck that" in reference to closed platforms - has made open source central to Meta's AI strategy.During Meta's second quarter earnings call, Zuckerberg further acknowledged there could be a shift, though he downplayed the significance of it. Here's what he said when asked if his thinking had changed.