That doesn't necessarily mean the history we know is false though, some of them actually wrote the truth :p While it is a somewhat true statement, it's a bit too simplistic to account for everything. For example - the Roman Empire fell to the barbarian hordes, but we know this because of the accounts from the Roman Empire, not from the barbarians.
@Apocalypse
The one defining characteristic of an opinion is that it cannot be proven true/false by empirical evidence and it doesn't require such proof. "I think Mondrian is a better painter than Monet" is an opinion, but it can in no way be proven true or false. A hypothesis is always testable, while an opinion doesn't have to be. Hypothesis =\= opinion.
