Improperly drafted deeds, trusts, instruments, and wills can result in invalid future interests.
But it follows that rights may be owned or held for less than an infinite amount of time.
This remainder cannot vest until Smith dies, because it cannot be determined how many children might be born to Smith (or adopted by Smith) and how many might be alive when he dies, until his actual death.
The remainder will vest only when he dies and the life estate terminates.
Any hypothetical violation of the Rule, no matter how improbable, extinguishes otherwise legitimate interests. If one member of a class of possible takers of a future interest potentially takes a vested interest beyond the prescribed time, the interests of all members of the class fail.
The Rule Against Perpetuities challenges those who draft property documents.