I used to work in biology labs and even jars of autoclaved media would periodically spontaneously grow cultures; it's effectively impossible to eliminate spores with heat.
Resterilization isn't the only problem - if at any time there is significant bacterial growth, toxins accumulate and are not cleared by sterilization. Combined with spores that periodically reactivate and grow you end up with a far number of articulated risks.
Can you really sit around boiling a stock every 10 minutes for 24 hours? Why would you even do that?
I used to work in biology labs and even jars of autoclaved media would periodically spontaneously grow cultures; it's effectively impossible to eliminate spores with heat.
Resterilization isn't the only problem - if at any time there is significant bacterial growth, toxins accumulate and are not cleared by sterilization. Combined with spores that periodically reactivate and grow you end up with a far number of articulated risks.
Can you really sit around boiling a stock every 10 minutes for 24 hours? Why would you even do that?