Quote From Tudor_Queen:
I've been feeling so demotivated, even though I have so much to do in such a short space of time (in fact, I think that's contributing to it). I'm having to write up the most boring study that didn't find anything and was just utter rubbish anyway. The other two studies I've done are probably enough data for the thesis. Do I HAVE to include this? I so cannot be bothered to write it up. There is NOTHING interesting about it and it is driving me insane.
No you dont have to include everything.
I left out one piece of published work because it didnt fit the story I was telling.
I also left out something else which didnt give an interesting answer.
It might help you to mention in the viva that your thesis doesnt include everything.