:::See the verifiability policy at WP:V; read at least the initial paragraph. Also see the due weight policy at WP:DUE (this is one section of the neutral point of view policy at WP:NPOV). For some thoughts by individual editors on Truth in Wikipedia, see the essays WP:Truth, WP:Verifiability, not truth, WP:Verifiability, not truth, WP:The Truth. I'm in too much of a rush right now to spend much time on this, but here are some observations & suggestions: 
 :::*It seems to me that the lead section of this article ought to be redone with the WP:LEAD guideline in mind. The specific claim about half a million years, along with the Ref of its supporting cite, should probably be removed from the lead, and its supporting source Ref moved to support the initial sentence of the First human vestiges section. I note that this supporting source is a general knowledge source, and the language used there probably contains simplifications from the language which would be used in an academic source. 
 :::*The second sentence of the First human vestiges section appears to be supported by an academic source (perhaps the study mentioned in the other general knowledge source), and says Homo erectus, not Human. 
 :::* The WP Human article says, "Humans (Homo sapiens) are primates of the family Hominidae, and the only living species of the genus Homo." That article cites supporting sources for that assertion. 
 :::*It looks to me as if the author of the cited general knowledge source oversimplified by describing the species Homo erectus as Human. That may have been an intentional oversimplification to avoid complicating the article with distinctions between the two members of the Genus Homo. 
 :::*If the general knowledge source is to be used, perhaps a clarifying footnote should be added regarding this use of terminology. 
 :::   (earlier Boracay Bill)