To shuffle off this mortal coil means to die, but in this context the speaker has ensured that if he lives on before his children are of age, they will be taken care of.
Context: "I have already ensured that if I live on before my children are of age." Claim: "I have already ensured that if I shuffle off this mortal coil before my children are of age."
Considering the context, is the claim true, false, or unknown?