well we can't be certain, h could exist or he couldn't, some people might have REALLY saw him and didn't know what the heck they were looking at other people could have hoaxed it you never know. and most of the people saying they saw him might have not known how to edit skin textures. i don't and I've seen him, all though i didn't get a picture, and besides how could he just disappear and then reappear or in fact RUN as i say RUN from the player? human mobs can really run they walk not like the real player. and yeah notch could have been trolling when he put "removed herobrine" like 3 times but you never know he could have tried to remove him, it didn't work then tried to remove him again. i mean it makes since. but like i first said we don't really know if hes real or fake only time can tell