I think we are in agreement. I too disbelieve there was ever a doctor appoinment. I feel she woke up intending the day go one way. Something happened on the drive. Her casually mentioning a doctor appintment across a crowded gym I feel was done spur of the moment as she was formulating her plan to make Kyron disappear. I think we are sayign the same thing, that the appointment was always fiction meant to buy time with no phone call home regarding Kyron's absence from school. Where we disagree is that I feel it was done spur of the moment, on the fly as she was formulating a spur of the moment plan of what to do and how to do it. you feel it is proof that she woke up that morning with the plan already in place.
We agree on her being responsible but disagree on how much premeditation was involved. For the record, whether the plan was devised well ahead of time or that morning, a plan was still devised. That plan, weeks, months, or 20 minutes old is still a plan and still equals premeditation IMO. So you see, we agree, just not on the details.