I think it's even simpler -- liars attracting any degree of press attention won't be able to get away with it.
"That picture was Photoshopped" doesn't work as a defense because it's not too difficult for experts to tell a Photoshop from a genuine image, nor to interview someone at the scene of an alleged event and learn the truth.
The same will be true with deepfakes, only much more so, because there are so many more ways to give away that it's a deepfake. Video adds new dimensions of scrutiny like how well the fake face tracks the head, matches lighting and expression, etc. Deepfake detection is in its infancy but you can bet it'll be even more accurate than Photoshop detection.
"That picture was Photoshopped" doesn't work as a defense because it's not too difficult for experts to tell a Photoshop from a genuine image, nor to interview someone at the scene of an alleged event and learn the truth.
The same will be true with deepfakes, only much more so, because there are so many more ways to give away that it's a deepfake. Video adds new dimensions of scrutiny like how well the fake face tracks the head, matches lighting and expression, etc. Deepfake detection is in its infancy but you can bet it'll be even more accurate than Photoshop detection.