History is always ambiguous. Facts are hard to establish, and capable of being given many meanings. Reality is built on our prejudices, misconceptions and ignorance as well as on our perceptiveness and knowledge.
—Salman Rushdie. "'Errata': or, Unreliable Narration in Midnight's Children." Imaginary Homelands: Essays and Criticism 1981-1991.
So true, we're all taught at school that history is this linear thing, A did X so B was pissed off and killed A and then C got in the picture and went after B and so on. But it's not like that at all, is it. And reality is almost impossible to decipher.
Joking response: it's totally easy to decipher. If you're on the "winning team," then you get to say who killed who, who's the bad guy, who's the good guy, etc. Case closed.
Less joking: Reality indeed seems impossible to decipher, since we all have our own different realities, i.e., perspectives on what reality is. I'm not sure how teachers would teach that, short of teaching students to be skeptical of everything.