Do Closed Timelike Curves Exist?

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But most think quantum gravity will prevent closed timelike loops?
 
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JesseM said:
"Shallow interior" here just means the region between the outer horizon and the inner horizon, and "deep interior" just means inside the inner horizon. So whoever wrote this is just saying that the region inside the inner horizon is objectionable because it contains CTCs, and a lot of physicists think that CTCs are a sign that something is going wrong with the theory (though this is just speculation, there is no proof that CTCs cannot exist in the real world).
what is wrong general relativity or the metric it self?
 

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