For all of you who can, a little science.
Water evaporates at 220 degrees Fahrenheit.
Pressure canning gets to 240 degrees Fahrenheit.
Toxin is killed at about 100 degrees Fahrenheit.
Spores require 240 degrees Fahrenheit to be killed.
So no matter how long you boil water, it never reaches the temperature that kills the spores that create the toxin.
This is the why I choose to pressure can versus water bath. I hate food poisoning.
From Terry White, owner Homestead, Bushcraft, And Survival Preparedness