I'm not big on wills; I know you'll have to think about that one day, but I usually like to avoid the topic. That said, Gallagy's explanation raised an important issue, IMO:
Nowhere does it say how much each of the grandchildren would get if they were to survive until 23.
Cf:
"If Robert Smith does not survive me for 30 days, to divide the residue of my estate into as many equal shares as there are of my children who are alive at my death, except if any child of mine has died before me and one or more of his or her children are alive at my death, then that deceased child will be considered alive for the purposes of this division and I direct my Trustee to divide that share equally among those children of that deceased child."
https://learnlsbc.ca/node/733It says "equal" and "equally"; that's what I'm missing here. It reads: "such child or children should take the share."
Unless "codified" somewhere, couldn't you argue that the exact share would be up to the surviving children? Say, Sam from Gallagy's example turns 23, but his brother is 17.
I thought "per stirpes" would've been shorter:
https://www.thebalance.com/per-stirpes-definition-in-wills-3...Best