Anyone ever think parents are unreasonable?

[LiberalManiacfromOC]

Well, yesterday we got back from Texas and I had 6 hours of homework to do there. I did all of it while they were out and now, when we got back, I was tired and I was doing my last bit of homework in between breaks. My mom came in and asked if I had all my homework done and I said "yeah, yeah sure." because I wasn't paying attention. When I went to type up my essay for english class, my keyboard the connection between the keyboard and the computer got messed up and I couldn't use the keyboard. My parents were sleeping already and so I couldn't ask them. I left a note on the door about the keyboard and that I needed a note so that the teacher wouldn't be mad (she like essays typed) and I went to sleep. This morning, they woke me up and I went and showered. Once I got out, they started screaming at me for not doing my homework (even though I wrote my essay on paper) and so I tell them how I did it. So, they say I lied to them. And I tell them that if I wasn't aware of it, then I didn't lie. So, now they refuse to sign a note saying the keyboard was broken and now I might fail my essay. Does anyone think that seems a little unfair?