Step-grandchildren described as “descendants” and “children”- can they inherit?

Step-grandchildren, will-making, descendants, childrenSome grandparents like to leave something to their grandchildren in their will.  If they have step-grandchildren as well, as is increasingly likely these days, are they to be included in the will too?

If grandparents intend step-grandchildren in their extended family to benefit under their will, then to assist their executors for the efficient administration of their estate, it would be helpful if they could make that clear in their will, as a recent New South Wales case has highlighted.