To Nev, I leave my favorite necklace from my collection. He must sell this and distribute the money as he thinks best between my loyal friends at the book club. If there is any confusion as to who my loyal friends are, my best friend, Zana will provide a list.

The above should be elaborate with this format with case relating to each validity of trust power

1) essential test of certainty -"is or is not test"

2) conceptual certainty

3)size of class

4) capriciousness

Can give me the answer in this formate - issue/rules/apply and conclusion