These impressive photos will trick you into thinking they’re paintings

If I adjust the picture with brightens,levels, curves it’s still photography?
If I adjust the picture locally (gradient, mask, color mask, color adjusting, color balance) it’s still photography?
If I adjust the picture with brush tool (smoothing, darkening, lighting with brush tool) it’s still photography?
If I adjust the picture with copy (stamp tool, copy past of the picture, remove a part of the picture) is it still a photography?
If I adjust the picture by painting a small detail with brush tool is it still a photography?
If I paint the picture from scratch is it still a photography?

Everybody will probably agree that 1 is a photography and last isn’t, but where exactly is the line this is photography this isn’t is hard to say.

That’s why only think to me witch matters is if I like the result, in this case 1,2,3 I don’t, in case 4 it’s not bad but still nothing great.

Source Article from http://www.dpreview.com/news/2013/09/16/these-impressive-photos-will-trick-you-into-thinking-theyre-paintings