I'm not a lawyer so I barely understand what you're discussing here (LOL!) but I, as a prospective juror could convict Casey of Murder 1 based on what I know right now.
Premeditation needs only to occur in the second prior to the act doesn't it?
If your negligence contributed to your childs death and in that moment you have to chose between calling 911 and getting your child help to save their life or watching them die and you chose the latter, that's premeditation is it not?
If Caylee drowned, she wouldn't have been declared dead for perhaps hours. EMS and the medical community would have fought as long and hard as they could to save her until it was deemed inappropriate and she would then be legally declared dead at that moment, not 2 hours earlier when she was found. Casey isn't in a legal position to declare her child dead, unless she intended to kill her and didn't care if lifeless was or wasn't death.
Hope I'm making sense. The Mothers on the jury will find her guilty. The defense should try and block all Mothers from the pool or their client's in trouble. JMO- I learn lots from reading your posts wudge!
The definition of "premeditation" is somewhat ambiguous and can easily be misleading. The legal definition of "premeditation" is with planning or deliberation. However, the amount of time needed for premeditation, regarding any act, depends on the person and the circumstances. After forming intent, the time must be long enough to act, and it must also allow for the person to have been fully conscious of the intent and to have considered the act.
As far as I know, you must have prior planning to have premeditation. Hence, in this case that lacks: a clear and unyielding motive, a place of death, a time of death, a cause of death, the mechanics of death, the circumstances surrounding the death, a confession and an eyewitness, then unless the words came from the defendant's mouth premeditation would appear not likely be proven to have existed for an instant or otherwise.
Additionally, the words in the legal definition are deliberation and planning. The definition for both of those words indicates that this is not an "instant" process. Although the definition states that it depends on the circumstances and the person and indicates that it could be "instantaneous", those two words indicate that it can not be so.
Still, the key thing is to prove it in court, and that means the prosecutors must prove deliberation and planning beyond a reasonable doubt.
As for the defense trying to exclude Mothers from the jury, I could not agree more. The next best group to exclude would be women, any model will do.