Sure, they could be. But they could also be reality. And the jury had a lot more evidence to consider which was more important and impactful than these notes.
If the only 'evidence' was the notes, then I'd agree they might be irrelevant. But they were added to some very important witness testimony , medical reports and her own testimony on the stand. In light of all of the other things, the handwritten thoughts had their place in deliberation. IMO
These notes did not just say things like 'I am worthless, and no good.' They were saying I INTENTIONALLY DID THIS , I AM EVIL.
That is one big step further than just I am worthless. And it is important to note that these notes were found among other notations in her journal, where she had made notations about some of the medical incidents she was charged with. Why is a nurse writing medical notes like that in her daily journal/calender?
Why was she routinely taking home private medical paperwork that was legally not allowed to leave the clinic? She had hundreds of those Daily Logs that were not supposed to be taken off the premises---many in a box under her bed. These stolen papers were considered in context with her journal notes and possible 'confessions' that were also in her possession.
Saying that the jury should not have been shown any of her journal writings does not make sense to me. They are investigating the suspect. They should see her writings and her thoughts from that critical time period, imo. l
IMO