Is internet history really deleted?

I mean for the iphone. If you really delete the cache cookies and history from the iphone. Is it really totally deleted?

It's not accessible from the OS, but the data is physically there on the data drive of the iPhone until it is overwritten by another piece of information. But this info can only be extracted via professional methods. (Hi-tech machinery) So as long as your history does not involve something the authorities would be after, nobody will be able to see it.

No, but not any normal person can find out. It's a complicated process.

so, kind of yes

I think the answer is yes, like the guy said, not normal person can find it
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