Can you detect a fake photo?

[quintessentone]

It was the first time I used Photoshop, so I took some 4 or 5 hours to do it.

Someone used to it would probably take 1 hour.

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I don't have the slightest idea of what that is supposed to mean. 

I just eyeballed both pictures looking for telltale signs of pixelation but now that I eyeball it again, it's too perfect where the change was made. If you get my meaning.

As for 'send it to the palace', all I can make of that comment is that it may some how refer to that picture of Prince Andrew and that young girl...send it to the palace so they can see how well AI can manipulate a picture so as to remove that young girl from the picture.